for (;;);{"error":null,"payload":{"timeline":"\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_83\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3261676\" id=\"3261676\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_82\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_0\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e created this task.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3261676\" data-sigil=\"has-tooltip\" data-meta=\"0_81\"\u003e\u003cspan class=\"screen-only\"\u003eMay 15 2017, 7:33 AM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2017-05-15 07:33:37 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_86\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"display: none;\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3261687\" id=\"3261687\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-user-plus phui-timeline-icon\" data-meta=\"0_85\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"phui-handle\" data-sigil=\"hovercard\" data-meta=\"0_4\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-lock lightgreytext\" data-meta=\"0_5\" aria-hidden=\"true\"\u003e\u003c\/span\u003eRestricted Application\u003c\/span\u003e added a subscriber: \u003ca href=\"\/p\/Aklapper\/\" class=\"phui-handle phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_6\"\u003eAklapper\u003c\/a\u003e. \u003cspan class=\"phui-timeline-extra-information\"\u003e \u00b7  \u003ca href=\"\/herald\/transcript\/1833347\/\"\u003eView Herald Transcript\u003c\/a\u003e\u003c\/span\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3261687\" data-sigil=\"has-tooltip\" data-meta=\"0_84\"\u003e\u003cspan class=\"screen-only\"\u003eMay 15 2017, 7:33 AM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2017-05-15 07:33:37 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_89\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3261689\" id=\"3261689\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_88\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_7\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e renamed this task from \u003cspan class=\"phui-timeline-value\"\u003eReview research on perceived performance\u003c\/span\u003e to \u003cspan class=\"phui-timeline-value\"\u003eReview research on performance perception\u003c\/span\u003e.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3261689\" data-sigil=\"has-tooltip\" data-meta=\"0_87\"\u003e\u003cspan class=\"screen-only\"\u003eMay 15 2017, 7:33 AM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2017-05-15 07:33:55 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_92\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/st3g3yziltbwjorfzd75\/PHID-FILE-d5zes5mjcqa2dfoswe23\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Peter\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3261820\" id=\"3261820\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-user-plus phui-timeline-icon\" data-meta=\"0_91\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Peter\/\" class=\"phui-handle phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_8\"\u003ePeter\u003c\/a\u003e subscribed.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3261820\" data-sigil=\"has-tooltip\" data-meta=\"0_90\"\u003e\u003cspan class=\"screen-only\"\u003eMay 15 2017, 7:50 AM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2017-05-15 07:50:48 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_95\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3272021\" id=\"3272021\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-columns phui-timeline-icon\" data-meta=\"0_94\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_9\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e moved this task from \u003ca href=\"\/project\/board\/1212\/\" class=\"phui-handle\" data-sigil=\"hovercard\" data-meta=\"0_10\"\u003eInbox, needs triage\u003c\/a\u003e to \u003ca href=\"\/project\/board\/1212\/\" class=\"phui-handle\" data-sigil=\"hovercard\" data-meta=\"0_11\"\u003eBacklog: Maintenance, non-prioritized\u003c\/a\u003e on the \u003ca href=\"\/tag\/performance-team\/\" class=\"phui-handle\" data-sigil=\"hovercard\" data-meta=\"0_12\"\u003ePerformance-Team\u003c\/a\u003e board.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3272021\" data-sigil=\"has-tooltip\" data-meta=\"0_93\"\u003e\u003cspan class=\"screen-only\"\u003eMay 17 2017, 6:39 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2017-05-17 18:39:55 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell phui-timeline-green\" data-sigil=\"transaction anchor-container\" data-meta=\"0_99\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3298256\" id=\"3298256\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill fill-has-color phui-timeline-icon-fill-green\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-user phui-timeline-icon\" data-meta=\"0_97\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_13\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e claimed this task.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3298256\" data-sigil=\"has-tooltip\" data-meta=\"0_96\"\u003e\u003cspan class=\"screen-only\"\u003eMay 29 2017, 12:51 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2017-05-29 12:51:28 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill fill-has-color phui-timeline-icon-fill-green\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-arrow-right phui-timeline-icon\" data-meta=\"0_98\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_14\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e triaged this task as \u003cspan class=\"phui-timeline-value\"\u003eLow\u003c\/span\u003e priority.\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_109\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/st3g3yziltbwjorfzd75\/PHID-FILE-d5zes5mjcqa2dfoswe23\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Peter\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3300162\" id=\"3300162\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_108\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Peter\/\" class=\"phui-handle phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_15\"\u003ePeter\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003eEdited\u003cspan class=\"visual-only\" aria-hidden=\"true\"\u003e \u00b7 \u003c\/span\u003e\u003ca href=\"#3300162\" data-sigil=\"has-tooltip\" data-meta=\"0_107\"\u003e\u003cspan class=\"screen-only\"\u003eMay 30 2017, 2:13 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2017-05-30 14:13:23 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_105\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_106\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_16\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003eFYI: The original paper for the 0.1, 1, 10 seconds is: \u003ca href=\"http:\/\/www2.parc.com\/istl\/groups\/uir\/publications\/items\/UIR-1991-01-Card-CHI91-IV.pdf\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003ehttp:\/\/www2.parc.com\/istl\/groups\/uir\/publications\/items\/UIR-1991-01-Card-CHI91-IV.pdf\u003c\/a\u003e  ....  but they reference to two other publications, so let us dig into them too.\u003c\/p\u003e\n\n\u003cp\u003e"Designing and Engineering Time - The Psychology of Time Perception in Software (Steven C Seow)" seems really good as base that we all should read.\u003c\/p\u003e\n\n\u003cp\u003eFor RAIL: One perspective is that it actually doesn't matter if the numbers are based on scientific evidence or just made up by people at Google. They are now the de facto standard and that is what we will be compared with.\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell phui-timeline-black\" data-sigil=\"transaction anchor-container\" data-meta=\"0_115\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3390257\" id=\"3390257\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill fill-has-color phui-timeline-icon-fill-black\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-user phui-timeline-icon\" data-meta=\"0_111\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_17\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e removed \u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e as the assignee of this task.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3390257\" data-sigil=\"has-tooltip\" data-meta=\"0_110\"\u003e\u003cspan class=\"screen-only\"\u003eJun 29 2017, 10:38 AM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2017-06-29 10:38:14 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-link phui-timeline-icon\" data-meta=\"0_112\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_18\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e removed a project: \u003ca href=\"\/tag\/performance-team\/\" class=\"phui-handle\" data-sigil=\"hovercard\" data-meta=\"0_19\"\u003ePerformance-Team\u003c\/a\u003e.\u003c\/div\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-link phui-timeline-icon\" data-meta=\"0_113\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_20\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a project: \u003ca href=\"\/tag\/performance-team\/\" class=\"phui-handle\" data-sigil=\"hovercard\" data-meta=\"0_21\"\u003ePerformance-Team\u003c\/a\u003e.\u003c\/div\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-columns phui-timeline-icon\" data-meta=\"0_114\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_22\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e moved this task from \u003ca href=\"\/project\/board\/1212\/\" class=\"phui-handle\" data-sigil=\"hovercard\" data-meta=\"0_23\"\u003eBacklog: Maintenance, non-prioritized\u003c\/a\u003e to \u003ca href=\"\/project\/board\/1212\/\" class=\"phui-handle\" data-sigil=\"hovercard\" data-meta=\"0_24\"\u003eTo-do: Goals, prioritized next 4 Quarters\u003c\/a\u003e on the \u003ca href=\"\/tag\/performance-team\/\" class=\"phui-handle\" data-sigil=\"hovercard\" data-meta=\"0_25\"\u003ePerformance-Team\u003c\/a\u003e board.\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_118\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/q4xtskw4ul5dvrupkmqs\/PHID-FILE-ezxrezgeehrb4vjobxgz\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Krinkle\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3393006\" id=\"3393006\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-user-plus phui-timeline-icon\" data-meta=\"0_117\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Krinkle\/\" class=\"phui-handle phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_26\"\u003eKrinkle\u003c\/a\u003e subscribed.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3393006\" data-sigil=\"has-tooltip\" data-meta=\"0_116\"\u003e\u003cspan class=\"screen-only\"\u003eJun 29 2017, 9:22 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2017-06-29 21:22:27 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell phui-timeline-green\" data-sigil=\"transaction anchor-container\" data-meta=\"0_121\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3600178\" id=\"3600178\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill fill-has-color phui-timeline-icon-fill-green\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-user phui-timeline-icon\" data-meta=\"0_120\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_27\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e claimed this task.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3600178\" data-sigil=\"has-tooltip\" data-meta=\"0_119\"\u003e\u003cspan class=\"screen-only\"\u003eSep 12 2017, 1:12 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2017-09-12 13:12:41 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_130\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3624111\" id=\"3624111\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_129\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_28\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3624111\" data-sigil=\"has-tooltip\" data-meta=\"0_128\"\u003e\u003cspan class=\"screen-only\"\u003eSep 21 2017, 12:08 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2017-09-21 12:08:16 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_126\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_127\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_29\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003eVery interesting talk about recent original research on perceived performance on pageload: \u003ca href=\"https:\/\/air.mozilla.org\/measuring-the-subjective-the-performance-dashboard-with-estelle-weyl\/\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003ehttps:\/\/air.mozilla.org\/measuring-the-subjective-the-performance-dashboard-with-estelle-weyl\/\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003eIt also covers a follow-up ongoing research project to verify the viability of a metric that emerged from the first study. This ongoing one looks at demographics to see if perceived performance varies between different groups of people.\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_140\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3867099\" id=\"3867099\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_139\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_30\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003eEdited\u003cspan class=\"visual-only\" aria-hidden=\"true\"\u003e \u00b7 \u003c\/span\u003e\u003ca href=\"#3867099\" data-sigil=\"has-tooltip\" data-meta=\"0_138\"\u003e\u003cspan class=\"screen-only\"\u003eJan 2 2018, 2:10 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-02 14:10:02 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_136\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_137\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_31\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003eHere's my review of \u003ca href=\"http:\/\/theixdlibrary.com\/pdf\/Miller1968.pdf\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003e"Response Time in Man-Computer Conversational Transactions" by Robert B; Miller, Fall Joint Computer Conference 1968\u003c\/a\u003e, the first paper cited in the RAIL article.\u003c\/p\u003e\n\n\u003cp\u003eThis paper doesn't contain any original research. It's the typical example of a well-written essay that ends up listing magic numbers as fact. The paper is well-written and makes several intellectually appealing points, with interesting parallels and analogies, but it doesn't back anything up with research data. None of the ideas presented in the paper are attempted to be proven. Worse, they are presented as matter-of-fact truth. The paper ends with a list of arbitrary recommendations about response time limits for equally arbitrary task types.\u003c\/p\u003e\n\n\u003cp\u003eSome of the recommendations are so original\/bizarre they give pause, such as the idea that errors should be delayed on purpose to let users give up on their train of thought naturally, rather than being abruptly stopped by an instantaneous error. Some ideas described in the paper are intriguing and possibly worth exploring, but would require actual research to be validated, particularly when they go against all common practices seen on the web today.\u003c\/p\u003e\n\n\u003cp\u003eThe only research data the paper references to illustrate a point is seemingly from \u003cem\u003eS. S. Stevens, "Handbook of Experimental Psychology - chapter 32, Time Perception by H. Woodrow"\u003c\/em\u003e. It describes that an experiment was made to study how well people can differentiate different timespans. People had to listen to series of audio clicks, and were to tell which delays between clicks were shorter or longer. People's natural ability to distinguish between timespans was tested this way. It mentions that the same test was performed with light pulses and yielded the same results. Interestingly, the accuracy peak (where people could determine shorter\/longer duration with an accuracy of 90%) was for delays between 0.6 and 0.8 seconds.\u003c\/p\u003e\n\n\u003cp\u003eUnfortunately I couldn't get hold of that book chapter to get the details of the experiment. But even accepting these results as valid, it doesn't seem to be very usable in the context of web performance. When asking people to do something like this, they are focusing on the delays and not a human task. Miller's introduction makes a good point focusing on what people are trying to achieve through their compter interaction. Audio clicks and pulses of light that people concentrate on are quite different from computer interactions. It's hard to say that the fact that people can differentiate durations between sounds from 0.6 and 0.8 seconds translates into, say, the time it takes to load a web page. Or that a shorter time it takes to load an individual web page results in greater user satisfaction. People might perceive time differently in that context, making the reference figures obtained with audio clicks irrelevant.\u003c\/p\u003e\n\n\u003cp\u003eThe first part of the paper that describes a model of human task completion was refreshing to read, as it's a good reminder that people are trying to achieve something when interacting with a computer much greater than the fine-grained interactions, and the ultimate goal is to get out of the way when facilitating this greater task. Another appealing (unproven) point was that the difference between bad performance and terrible performance might not matter, as in either case we've interrupted the user's train of thought and greater task.\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_149\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3871298\" id=\"3871298\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_148\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_32\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3871298\" data-sigil=\"has-tooltip\" data-meta=\"0_147\"\u003e\u003cspan class=\"screen-only\"\u003eJan 3 2018, 1:33 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-03 13:33:45 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_145\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_146\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_33\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003eHere's my review of \u003ca href=\"https:\/\/www.nngroup.com\/articles\/response-times-3-important-limits\/\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003e"Response Times: The 3 Important Limits" by Jakob Nielsen, 1993\u003c\/a\u003e, cited in the RAIL article.\u003c\/p\u003e\n\n\u003cp\u003eThis is probably the essay I've seen quoted the most on that subject in my career. It's very short and as a result straightforward to review: it isn't based on any research data.  It distills Miller's arbitrary recommendations into 3 equally arbitrary limits, doing away with the various more elaborate interaction categories Miller had come up with. Its popularity probably stems from its shortness and simplicity. Nevertheless, it's not based on any study of the matter at hand and is just subjective advice, guidelines based on magic numbers pulled out of thin air.\u003c\/p\u003e\n\n\u003cp\u003eI couldn't get hold of the paper it cites in regards to progress indicators, "The importance of percent-done progress indicators for computer-human interfaces." Proc. ACM CHI'85 Conf. to verify whether or not it contains original research.\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_159\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3871419\" id=\"3871419\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_158\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_34\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003eEdited\u003cspan class=\"visual-only\" aria-hidden=\"true\"\u003e \u00b7 \u003c\/span\u003e\u003ca href=\"#3871419\" data-sigil=\"has-tooltip\" data-meta=\"0_157\"\u003e\u003cspan class=\"screen-only\"\u003eJan 3 2018, 2:15 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-03 14:15:02 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_155\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_156\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_35\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003eHere's my review of \u003ca href=\"http:\/\/sighci.org\/uploads\/published_papers\/bit04\/BIT_Nah.pdf\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003e"A Study on Tolerable Waiting Time: How long Are Web Users Willing to Wait?\u201d (PDF), Fiona Fui-Hoon Nah, Behaviour and Information Technology, 2004\u003c\/a\u003e, cited in the RAIL article.\u003c\/p\u003e\n\n\u003cp\u003eThis one reviewed existing literature and conducts a study of its own.\u003c\/p\u003e\n\n\u003cp\u003eIt cites a lot of studies worth looking into for this task, which I've added to the task description.\u003c\/p\u003e\n\n\u003cp\u003eA lot of the durations quoted from that priori literature as acceptable (sub-15, sub-20, sub-30 seconds) seem to me like they might be outdated expectations related to how slow the web was back then. A lot of people were still on dialup at that time. It would be interesting to see if more recent studies have been conducted, particularly on mobile, since these older studies are only about desktop use of the web.\u003c\/p\u003e\n\n\u003cp\u003eAfter the literature review, this paper concludes that everything cited so far is mostly magic numbers and sets out to perform an empirical study.\u003c\/p\u003e\n\n\u003cp\u003eThe study focuses on web-savvy users asked to perform a task if information retrieval on a given browser interface, about the same topic, on high-speed internet (\u003ca href=\"\/T1\" class=\"phui-tag-view phui-tag-type-object \" data-sigil=\"hovercard\" data-meta=\"0_2\"\u003e\u003cspan class=\"phui-tag-core-closed\"\u003e\u003cspan class=\"phui-tag-core phui-tag-color-object\"\u003eT1\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e) on a walled garden website. It had 70 participants. Half of them had a progress bar (with ping-pong animation, no actual percentage) show up while the page was loading, the other half didn't get any progress indication. The home page had 10 links, only 7 of which worked, almost instantly. The last 3 triggered infinite waiting time. Users had to press a "stop" button to terminate the wait when navigating to those. They were asked to visit all 10 links. The time between the request being made and pressing the "stop" button was measured.\u003c\/p\u003e\n\n\u003cp\u003eWhat happened is that when first encountering a link with infinite wait, people with progress bars waited longer (38 seconds on average) than people with no progress indication (13 seconds). On the second infinite wait link they encountered, these times shortened, but people with progress bars still waited longer (17 seconds vs 4 seconds average).\u003c\/p\u003e\n\n\u003cp\u003eNow, this comparison itself is of little use to us, since page progress display is built into browsers now. It also doesn't study phenomenons we encounter now, such as the page still changing after the progress bar is done. One might wonder if people display greater patience while the browser has a progress indicator, and become impatient after that point if the page still doesn't look "ready". Are users more impatient on browsers where the built-in progress bar is really thin\/out of the way? I think it would be interesting to see if there have been any attempts to study these things on more modern environments.\u003c\/p\u003e\n\n\u003cp\u003eAs for the absolute numbers obtained in that study, I don't think they are applicable now. Considering how specific the study was, not using a real browser and happening so long ago, user expectations might have changed greatly since, even with progress display. I also find the argument that people's behavior in regards to the browser progress bar can extend to everything happening on the page a bit of a stretch. I.e. it doesn't necessarily mean that progress bars inside the web page make people more patient.\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_162\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3871447\" id=\"3871447\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_161\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_36\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-6jjiy6abcrtt74j\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3871447\" data-sigil=\"has-tooltip\" data-meta=\"0_160\"\u003e\u003cspan class=\"screen-only\"\u003eJan 3 2018, 2:24 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-03 14:24:04 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_165\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3871526\" id=\"3871526\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_164\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_37\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-tyagd2wbapmtqyv\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3871526\" data-sigil=\"has-tooltip\" data-meta=\"0_163\"\u003e\u003cspan class=\"screen-only\"\u003eJan 3 2018, 2:53 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-03 14:53:54 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_169\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3871763\" id=\"3871763\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_167\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_38\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-4jn7qg7zz5mgppk\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3871763\" data-sigil=\"has-tooltip\" data-meta=\"0_166\"\u003e\u003cspan class=\"screen-only\"\u003eJan 3 2018, 4:17 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-03 16:17:04 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_168\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_39\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-xoeh53gr66mduym\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_178\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3885773\" id=\"3885773\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_177\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_40\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3885773\" data-sigil=\"has-tooltip\" data-meta=\"0_176\"\u003e\u003cspan class=\"screen-only\"\u003eJan 9 2018, 10:24 AM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-09 10:24:31 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_174\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_175\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_41\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003e\u003ca href=\"http:\/\/citeseerx.ist.psu.edu\/viewdoc\/download?doi=10.1.1.366.1170&rep=rep1&type=pdf\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003e"Characterizing Web Use on Smartphones\u201d, Chad C. Tossell, Philip Kortum, Ahmad Rahmati, Clayton Shepard, Lin Zhong, Conference on Human Factors in Computing Systems 2012\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis paper performs a study on students. 24 students who've never owned smartphones before are given one for a year and their usage patterns are monitored. It's quite a small sample size, imho, and all with the same background, living the same lifestyle. The study finds huge differences in how participants use their phone. some barely use the browser, others use it 11 times a day. With such a wide gap in behavior it seems like the sample size is quite small to draw general conclusions.\u003c\/p\u003e\n\n\u003cp\u003eSite revisitation is studied, bookmark usage, browsing patterns, as well as the difference between native apps and the browser. They also look into where people are when they use their mobile phone and what they do while in different locations.\u003c\/p\u003e\n\n\u003cp\u003eI really didn't find much that was related to performance, which makes me wonder why this particular study was quote in the RAIL announcement, other than to prove the rather obvious point that people consume the web differently on mobile than they do on desktop. This paper does so by comparing results to a previous similar study on desktop users with a comparable sample size.\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_181\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3885774\" id=\"3885774\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_180\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_42\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-w3ktbgxruixch3c\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3885774\" data-sigil=\"has-tooltip\" data-meta=\"0_179\"\u003e\u003cspan class=\"screen-only\"\u003eJan 9 2018, 10:24 AM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-09 10:24:57 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_191\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3885953\" id=\"3885953\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_190\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_43\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003eEdited\u003cspan class=\"visual-only\" aria-hidden=\"true\"\u003e \u00b7 \u003c\/span\u003e\u003ca href=\"#3885953\" data-sigil=\"has-tooltip\" data-meta=\"0_189\"\u003e\u003cspan class=\"screen-only\"\u003eJan 9 2018, 12:00 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-09 12:00:44 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_187\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_188\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_44\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003e\u003ca href=\"https:\/\/link.springer.com\/chapter\/10.1007%2F978-3-642-23771-3_42\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003eKaaresoja T., Hoggan E., Anttila E. (2011) Playing with Tactile Feedback Latency in Touchscreen Interaction: Two Approaches. In: Campos P., Graham N., Jorge J., Nunes N., Palanque P., Winckler M. (eds) Human-Computer Interaction \u2013 INTERACT 2011. INTERACT 2011.\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis paper conducts two studies about latency of tactile feedback for virtual buttons on touchscreens.\u003c\/p\u003e\n\n\u003cp\u003eThey do some literature review on studies about latency. Mostly determining the threshold between feeling something is instantaneous and perceiving latency in different contexts. For hearing and touch, the threshold for perceiving latency is quoted to be between 20 and 30ms. I'm not going to look into the studies that brought those numbers, as I don't think they apply to interaction with a website. There is one study referenced where people are asked to move a rectangle on the screen with a mouse and different amount of latency were introduced. But it's extremely dated (1993).\u003c\/p\u003e\n\n\u003cp\u003eBack to the study of tactile feedback, there were only 12 test subjects. Half female half male, age range 18 to 47. They were given a modified Nokia tablet with the ability to have the display vibrate. The display vibrated on button down action. Then they introduce different latencies for when the vibration happens after touch is detected. I'm not aware of mobile devices doing this nowadays, so I don't think it's a problem worth looking into at the moment, as the idea that code on a website could have an effect on the latency of haptic feedback on the device is far-fetched.\u003c\/p\u003e\n\n\u003cp\u003eFreeform feedback from the first study makes researchers realize that consistent high latency gives the illusion of weight for the button, and they conduct a second study studying that phenomenon.\u003c\/p\u003e\n\n\u003cp\u003eThe study shows that increased latency doesn't increase typing errors. But it does increase subjective frustration\/negative view of the product. There isn't a lot of difference in terms of positive rating between 18 and 72ms latency, but it goes down significantly past that threshold, when dealing with a range of random latency between 18 and 144ms. It's hard to say if the issue in that case is high latency encountered occasionally, or the fact that the latency experienced varies widely. It would have been interesting if the study tried a consistent 144ms latency, for example. Previous essays I've reviewed so far suggested the idea that performance variance was worse that consistent bad performance. Hopefully we'll run into a study that looked into that particular topic.\u003c\/p\u003e\n\n\u003cp\u003eAgain, I kind of wonder why this particular paper was included in the RAIL announcement as well.\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_194\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3885954\" id=\"3885954\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_193\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_45\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-roh6fvtcjmi5k3a\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3885954\" data-sigil=\"has-tooltip\" data-meta=\"0_192\"\u003e\u003cspan class=\"screen-only\"\u003eJan 9 2018, 12:01 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-09 12:01:03 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_204\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3886357\" id=\"3886357\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_203\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_46\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003eEdited\u003cspan class=\"visual-only\" aria-hidden=\"true\"\u003e \u00b7 \u003c\/span\u003e\u003ca href=\"#3886357\" data-sigil=\"has-tooltip\" data-meta=\"0_202\"\u003e\u003cspan class=\"screen-only\"\u003eJan 9 2018, 1:45 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-09 13:45:24 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_200\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_201\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_47\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003e\u003ca href=\"http:\/\/citeseerx.ist.psu.edu\/viewdoc\/download?doi=10.1.1.78.155&rep=rep1&type=pdf\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003e2005: \u201cInteraction in 4-Second Bursts: The Fragmented Nature of Attentional Resources in Mobile HCI\u201d Antti Oulasvirta, Sakari Tamminen, Virpi Roto, and Jaana Kuorelahti, Interruptions in Human Computer Interaction\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003eIn this study 28 people in Finland were asked to search for specific information on the web on a mobile device, while physically going through a ruban route (including metro, escalators, etc.). Sometimes tasks had to be completed while moving , others while sitting or standing. Participants were carrying cameras to record their gaze, etc. The screenshots from the study suggest very dated mobile web without touchscreens (WAP-based?). The average link-clicked-to-page-starting-to-load duration was 16.2 seconds! The connection was GPRS...\u003c\/p\u003e\n\n\u003cp\u003eThe study goes on exploring the differences in terms of attention span that people give to the mobile device in different situations. Unsurprisingly, the busier people are physically, the shorter the attention windows to the mobile device get. The point being that any experiment done on mobile devices will yield vastly different results in a lab setting than in real life. I think this is a basic principle to remember when we study mobile usage.\u003c\/p\u003e\n\n\u003cp\u003eI doubt however, that any of the figures from that study have any meaning nowadays. The users back then must have adapted to pages taking 16+ seconds to load in their usage pattern. Not to mention the mobile interfaces and UX have completely changed since then, as well as the density of information available on mobile screens.\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_207\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3886360\" id=\"3886360\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_206\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_48\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-aqrxwoy3uoqmf5e\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3886360\" data-sigil=\"has-tooltip\" data-meta=\"0_205\"\u003e\u003cspan class=\"screen-only\"\u003eJan 9 2018, 1:45 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-09 13:45:44 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_216\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3886400\" id=\"3886400\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_215\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_49\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3886400\" data-sigil=\"has-tooltip\" data-meta=\"0_214\"\u003e\u003cspan class=\"screen-only\"\u003eJan 9 2018, 1:56 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-09 13:56:46 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_212\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_213\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_50\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003eI'm going to leave the older papers aside for now and look for more relevant recent studies instead to complete the list. Dated technology, particularly for mobile, makes a lot of these older studies difficult to translate to current usage patterns.\u003c\/p\u003e\n\n\u003cp\u003eSo far, besides the classic Miller and Nielsen papers which are both essays, everything academic quoted in the RAIL article has turned out to be quite off topic.\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_219\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3886414\" id=\"3886414\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_218\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_51\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-o5rhcz4tlkmfyci\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3886414\" data-sigil=\"has-tooltip\" data-meta=\"0_217\"\u003e\u003cspan class=\"screen-only\"\u003eJan 9 2018, 2:03 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-09 14:03:48 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_222\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3890960\" id=\"3890960\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_221\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_52\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-ppcmvs3g7pqbhgg\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3890960\" data-sigil=\"has-tooltip\" data-meta=\"0_220\"\u003e\u003cspan class=\"screen-only\"\u003eJan 10 2018, 7:28 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-10 19:28:20 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_225\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"display: none;\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3890961\" id=\"3890961\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-user-plus phui-timeline-icon\" data-meta=\"0_224\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"phui-handle\" data-sigil=\"hovercard\" data-meta=\"0_53\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-lock lightgreytext\" data-meta=\"0_54\" aria-hidden=\"true\"\u003e\u003c\/span\u003eRestricted Application\u003c\/span\u003e added a subscriber: \u003ca href=\"\/p\/revi\/\" class=\"phui-handle phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_55\"\u003erevi\u003c\/a\u003e. \u003cspan class=\"phui-timeline-extra-information\"\u003e \u00b7  \u003ca href=\"\/herald\/transcript\/2180148\/\"\u003eView Herald Transcript\u003c\/a\u003e\u003c\/span\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3890961\" data-sigil=\"has-tooltip\" data-meta=\"0_223\"\u003e\u003cspan class=\"screen-only\"\u003eJan 10 2018, 7:28 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-10 19:28:21 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_234\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3893389\" id=\"3893389\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_233\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_56\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3893389\" data-sigil=\"has-tooltip\" data-meta=\"0_232\"\u003e\u003cspan class=\"screen-only\"\u003eJan 11 2018, 2:25 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-11 14:25:00 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_230\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_231\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_57\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003e\u003ca href=\"https:\/\/research.spec.org\/icpe_proceedings\/2015\/icpe\/p245.pdf\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003e"Defining Standards for Web Page Performance in Business Applications" Rempel 2015\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe empirical studies it cites are all on our list already. Its criticism of the Nah study is very relevant: the working links all worked instantly, conditioning participants that links either never load or load instantly, which definitely affects their waiting time when they encounter more than one broken link.\u003c\/p\u003e\n\n\u003cp\u003eIt then looks at satisfaction surveys, trying to sort out the good ones.\u003c\/p\u003e\n\n\u003cp\u003eIts conclusion of the overall landscape of that subject's study is that it's all over the place and inconsistent.\u003c\/p\u003e\n\n\u003cp\u003eSadly, for lack of better options, it defaults to Miller's magic numbers as the reference, mistakenly assuming that they came out of physical studies.\u003c\/p\u003e\n\n\u003cp\u003eAfter this literature review, it describes a passive study it conducted using RUM, on a web-based business service with 1200 users, all in North America, 10 million pageviews a month. The application was already optimized for performance and users encouraged to report perceived performance issues within the system. The study covers different timespans, including the launch, a period of performance issues, incremental improvements on those performance problems and a latter period where everything is stable and performance fully optimized.\u003c\/p\u003e\n\n\u003cp\u003eThey used synthetic testing at the most remote geographical location where their real users were based, as well as in the datacenter, to continuously measure response time on a predetermined browsing scenario within the app. This was to estimate how much of the performance was affected by real network latency. They also used server-side logging to see how long requests took to complete from the server's perspective.\u003c\/p\u003e\n\n\u003cp\u003eThe server-side percentiles history clearly show the performance issues period and the subsequent optimizations. There's a strong correlation between that and the number of performance-related complaints filed in their service desk (once fully optimized and stable, they get 0 complaints - at the peak of issues, 22 complaints per month).\u003c\/p\u003e\n\n\u003cp\u003eHaving reached this ideal situation of not getting complaints anymore, they basically take the percentiles of server response time they have at that point and set them as the new standard to aim for in their organization.\u003c\/p\u003e\n\n\u003cp\u003eI think this is a very interesting approach that could actually apply to us. Encouraging people to report performance issues on a permanent basis would be a good thermometer of how well we're doing. And I expect that improving performance significantly should move the needle on report rates, just like it did for them. Better yet, this could allow detecting spikes, anomalies in performance issue reports, that we could easily try to correlate to geography, UAs, pages reported from.\u003c\/p\u003e\n\n\u003cp\u003eIn a sense, this approach worked around the problem of not having universal performance metrics or criteria to apply to their particular situation. It also acknowledges the fact that each service is different, with a different audience, and what might apply to one context might not apply to another. That being said, this approach doesn't help with selecting *what* should be optimized, nor does it answer questions about what is most important in terms of perceived performance.\u003c\/p\u003e\n\n\u003cp\u003eFurthermore, improved performance in this study also came with a compression of percentiles. Which brings us back to the unanswered question of whether response time variance is as serious a problem as slow response time per se. I believe that this approach would need to be complemented with worsening performance variance and performance in various ways on purpose to see how the user report rates correlate to those different factors.\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_237\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3893390\" id=\"3893390\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_236\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_58\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-f4khgvrzjbay7w5\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3893390\" data-sigil=\"has-tooltip\" data-meta=\"0_235\"\u003e\u003cspan class=\"screen-only\"\u003eJan 11 2018, 2:25 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-11 14:25:26 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_247\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3896221\" id=\"3896221\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_246\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_59\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003eEdited\u003cspan class=\"visual-only\" aria-hidden=\"true\"\u003e \u00b7 \u003c\/span\u003e\u003ca href=\"#3896221\" data-sigil=\"has-tooltip\" data-meta=\"0_245\"\u003e\u003cspan class=\"screen-only\"\u003eJan 12 2018, 9:21 AM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-12 09:21:36 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_243\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_244\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_60\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003e"The duration perception of loading applications in smartphone: Effects of different loading types" Wenguo Zhao, Yan Ge, Weina Qu, Kan Zhang, Xianghong Sun 2017\u003c\/p\u003e\n\n\u003cp\u003e43 paid volunteers in this study, mostly students, looking at black loading screen for a mobile app versus animated loading screen. The duration of the loading time for each app was controlled as part of the experiment. Unfortunately, the experiment was conducted in a computer lab on a simulated smartphone, where people clicked instead of touched the screen.\u003c\/p\u003e\n\n\u003cp\u003eAfter trial runs, users were asked to estimate the amount of time they waited for the app to open. At equal duration, they found the black screen to be shorter than the animation (it was estimated as being about 13% shorter). User satisfaction followed, with people being more satisfied with the black loading screen experience than the animation.\u003c\/p\u003e\n\n\u003cp\u003eAnother observed phenomenon is that people overestimated short times and underestimated long times. However, the study doesn't verify whether that's a general phenomenon when asking people to mentally measure time without cues. It could well be unrelated to the experiment and just the nature of being having to estimate passing time.\u003c\/p\u003e\n\n\u003cp\u003eThere are many weaknesses in this study. It was done in a lab, on a computer, and people were asked to focus on the app loading. While a smartphone is simulated on screen, this is a very different experience than having a smartphone in your hand and it's hard to say to what extent people had desktop experience expectations when interacting with this system, clicking on things. And by having people do trial runs and be asked explicitly about loading times, it made them focus on something that people don't normally concentrate on. As the study points out itself, all participants were young, which can affect temporal perception. Finally, the animation picked is very odd and unusual, which I think can skew the results greatly (a white circle on a black background, with 5 black dots rotating on the white circle).\u003c\/p\u003e\n\n\u003cp\u003eAll in all good intentions, but I'm skeptical of the results given the many shortcomings of the experimental setup.\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_250\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3896222\" id=\"3896222\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_249\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_61\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-hbubfhktvd2xwqt\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3896222\" data-sigil=\"has-tooltip\" data-meta=\"0_248\"\u003e\u003cspan class=\"screen-only\"\u003eJan 12 2018, 9:22 AM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-12 09:22:09 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_259\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3896375\" id=\"3896375\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_258\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_62\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3896375\" data-sigil=\"has-tooltip\" data-meta=\"0_257\"\u003e\u003cspan class=\"screen-only\"\u003eJan 12 2018, 10:52 AM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-12 10:52:41 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_255\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_256\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_63\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003e"The Web, the Users, and the MOS: Influence of HTTP\/2 on User Experience" Enrico Bocchi, Luca De Cicco, Marco Mellia, Dario Rossi, 2017\u003c\/p\u003e\n\n\u003cp\u003eStudy of subjective user feedback comparing HTTP\/1 and HTTP\/2, using real popular websites mirrored on local servers. 147 participants, 4000 ratings. They control protocol, RTT, etc. All participants use the same Linux computer with Google Chrome on it. The experiment consists of people following links, which open the sites in Chrome, and then rating the experience, while at the same time the real loading time is recorded with the network log\/HAR files. They test asset sharding\/unsharding, homogeneous\/heterogeneous RTT.\u003c\/p\u003e\n\n\u003cp\u003eLooking at objective measurements, ObjectIndex (a metric highly correlated to SpeedIndex) has a median improvement of 40ms for HTTP\/2, with a better ObjectIndex in 65% of the cases.  Page Load Time is 22ms better in terms of median, in 54% of the cases. Those objective performance improvements aren't predictors of people's subjective feedback on performance.\u003c\/p\u003e\n\n\u003cp\u003eWhile the methodology was interesting, the research doesn't consider the fact that the objective performance gains might be too small for people to perceive. A difference in the range of 20-40ms, not shown side to side, might be difficult for people to detect. Increasing RTT was an interesting thing to do, but they should have limited bandwidth as well, to see if the performance differences would have increased to the point of being more noticeable by users. If this study shows one thing, it's that improving page load performance by only 20-40ms is hardly noticeable by users on average.\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_262\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3896396\" id=\"3896396\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_261\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_64\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-dwzblzhkvesjpry\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3896396\" data-sigil=\"has-tooltip\" data-meta=\"0_260\"\u003e\u003cspan class=\"screen-only\"\u003eJan 12 2018, 10:55 AM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-12 10:55:38 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_271\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3896475\" id=\"3896475\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_270\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_65\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3896475\" data-sigil=\"has-tooltip\" data-meta=\"0_269\"\u003e\u003cspan class=\"screen-only\"\u003eJan 12 2018, 11:56 AM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-12 11:56:18 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_267\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_268\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_66\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003e\u003ca href=\"https:\/\/perso.telecom-paristech.fr\/~drossi\/paper\/rossi16internet-qoe.pdf\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003e"Measuring the Quality of Experience of Web users" Bocchi, De Cicco, Rossi 2016\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe previous paper I reviewed mentioned ObjectIndex, which is a metric the same researchers developed in this paper. They review popular performance metrics, such as TTFB, TTFP, DOMload, onload, SpeedIndex, PageSpeed, etc. Rightfully criticizing metrics that they categorize as "time instant" like TTFB, as not being representative on their own of the entire chain of events that make up a pageload.\u003c\/p\u003e\n\n\u003cp\u003eThen they study SpeedIndex and generalize its concept as "time-integral metrics". I.e. metrics that capture the progression over time. They rightfully point out that SpeedIndex's greatest weakness is the computational overhead required to record video while the experiment is running, skewing the experiment's results.\u003c\/p\u003e\n\n\u003cp\u003eThey propose two new metrics, ByteIndex and ObjectIndex. Where instead of measuring visual progress, they measure bytes progress and object progress, "the SpeedIndex way". There is no above-the-fold aspect in those two new metrics.\u003c\/p\u003e\n\n\u003cp\u003eThey run an experiment on the top 100 Alexa sites, running each page 10 times to account for real internet performance variability, on Google Chrome only, driven by WebPageTest, collecting all the metrics discussed. Then they compare how they correlate. They find that the new proposed metrics correlate as highly as SpeedIndex with the basic "time instant" metrics. And that the new metrics correlate highly with SpeedIndex (more than 80% correlation).\u003c\/p\u003e\n\n\u003cp\u003eFinally, they discuss how these basic metrics could be improved to compensate for the differences between bytes and objects (not all bytes have the same impact on the page depending on their nature, eg. HTML vs images, and the same can be said for objects).\u003c\/p\u003e\n\n\u003cp\u003eWith wikis' tendency to have very long articles, the shortcut of ignoring the above-the-foldness of things might mean that in our case ByteIndex\/ObjectIndex correlates less with SpeedIndex than in the general case. Still, I think those two suggested metrics have value in the sense that they capture the progression of things, and not just a snapshot of a particular event. It would be interesting to study those three metrics on a decent set of wiki pages to verify the correlation ourselves and assess whether or not any of those two novel metrics would be useful for us. And we could also explore the various improvements suggested for a more fine-tuned time-integral metric. My main takeaway is that if we design a new metric, the ability to capture progress would indeed be a valuable quality.\u003c\/p\u003e\n\n\u003cp\u003eThere is something to be said about the fact that measuring SpeedIndex affects SpeedIndex. As such, it is indeed interesting that the correlation between ObjectIndex and Start Render\/onLoad\/DOM\/TTFB is just as strong or stronger than SpeedIndex's. I think it would be interesting to explore the idea we've discussed before of decoupling the SpeedIndex recording from the browser, via an uncompressed remote X session, or better yet, recording the video feed coming out of a computer running a browser, and comparing the results to those obtained by running Browsertime\/WebPageTest on the same machine as the browser. This would allow us to measure the "ideal" SpeedIndex, and see how different it is from what we are currently collecting.\u003c\/p\u003e\n\n\u003cp\u003eFinally, one of their best suggestions, in my opinion, would be to collect a large corpus of HAR files annotated with user subjective ratings of performance, to analyze which metrics based on what's available in HAR files could correlate best with users' perceived performance. Or we could also do the same and limit ourselves to RUM metrics (which would actually make data collection easier). I think this is something where machine learning could help, particularly if we continuously feed it user feedback. Basically predicting for every measure pageload what the performance perception score would have been if a user rated it.\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_274\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3896477\" id=\"3896477\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_273\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_67\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-fbsa65fhc73uox6\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3896477\" data-sigil=\"has-tooltip\" data-meta=\"0_272\"\u003e\u003cspan class=\"screen-only\"\u003eJan 12 2018, 11:56 AM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-12 11:56:44 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_277\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3896732\" id=\"3896732\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_276\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_68\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-fm5iho4lqef52lc\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3896732\" data-sigil=\"has-tooltip\" data-meta=\"0_275\"\u003e\u003cspan class=\"screen-only\"\u003eJan 12 2018, 2:13 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-12 14:13:05 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_286\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3896905\" id=\"3896905\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_285\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_69\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3896905\" data-sigil=\"has-tooltip\" data-meta=\"0_284\"\u003e\u003cspan class=\"screen-only\"\u003eJan 12 2018, 3:22 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-12 15:22:38 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_282\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_283\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_70\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003e\u003ca href=\"https:\/\/pdfs.semanticscholar.org\/3a8e\/2eb20f987e518458386dcd44fd8d11df936d.pdf\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003e"Narrowing the gap between QoS metrics and Web QoE using Above-the-fold metrics" Diego Neves da Hora, Alemnew Sheferaw Asrese, Vassilis Christophides, Renata Teixeira, Dario Rossi 2018\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003eMore follow-up research on that trail, building up on the previous one.  And lo and behold, machine learning models, user surveys and more.\u003c\/p\u003e\n\n\u003cp\u003eThey first set out to measure "ATF" (the time when everything above-the-fold is displayed), by looking at where DOM elements are when the page is done, figuring out which ones are above-the-fold, and looking at they were loaded. For things they can't determine, like stylesheets, they assume they were above-the-fold. They take the latest load time of all sub-resources considered as being above-the-fold as the ATF value. This is implemented as a Chrome plugin, executing after page onload.\u003c\/p\u003e\n\n\u003cp\u003e241 volunteers used this Chrome plugin and rated close to 9000 browsing sessions. The test focuses on 12 non-landing webpages from top 100 Alexa websites in France, with page sizes from O.43 to 2.88MB and number of "objects" (I assume subrequests) from 24 to 212. They filter out failed pageloads and people who didn't review at least 10 pageloads. In the end after removing more bad data, they end up looking at 3400 user ratings. They mention using the same experimental setup as their HTTP\/2 study, meaning that the pages are served by local servers and the client has cache disabled.\u003c\/p\u003e\n\n\u003cp\u003eThen they look how the ratings correlate to various "expert model" metrics. The metric with the best correlation to user ratings (85%) is ImageIndex to ATF. That metric looks at the progression of the bytes for images above the fold, from origin of the pageload until ATF.\u003c\/p\u003e\n\n\u003cp\u003eAfter that they try 3 machine learning algorithms, feeding either the 9 raw metrics they were studying, or the 3 expert model metrics derived from them previously, combined with the raw metrics, as 27 features total. The best machine learning model is on par with the best expert model from before, based on ImageIndex\/ATF.\u003c\/p\u003e\n\n\u003cp\u003eThey acknowledge that trying to achieve a one-size-fits-all model with very varied web pages is probably doomed to fail, suggesting that pages should be classified to be evaluated with per-class models.\u003c\/p\u003e\n\n\u003cp\u003eIt's unfortunate that they don't list the 12 pages used to see how image-heavy they were. Another shortcoming is that those pageloads are all with cache disabled. No mention is made of bandwidth throttling (in the HTTP\/2 experiment, it was uncapped. For our case where a lot of articles don't have above-the-fold images besides the site logo, and with the logo being heavily cached between pageviews, it seems less likely that bytes of images above-the-fold would work well for us.\u003c\/p\u003e\n\n\u003cp\u003eThe Chrome plugin used in the study: \u003ca href=\"https:\/\/github.com\/TeamRossi\/ATF-chrome-plugin\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003ehttps:\/\/github.com\/TeamRossi\/ATF-chrome-plugin\u003c\/a\u003e\u003cbr \/\u003e\nAnd the full dataset of the study: \u003ca href=\"https:\/\/newnet.telecom-paristech.fr\/index.php\/webqoe\/\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003ehttps:\/\/newnet.telecom-paristech.fr\/index.php\/webqoe\/\u003c\/a\u003e\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_289\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3896909\" id=\"3896909\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_288\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_71\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-umkonftuz377l6t\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3896909\" data-sigil=\"has-tooltip\" data-meta=\"0_287\"\u003e\u003cspan class=\"screen-only\"\u003eJan 12 2018, 3:23 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-12 15:23:00 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_299\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/st3g3yziltbwjorfzd75\/PHID-FILE-d5zes5mjcqa2dfoswe23\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Peter\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3902690\" id=\"3902690\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_298\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Peter\/\" class=\"phui-handle phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_72\"\u003ePeter\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003eEdited\u003cspan class=\"visual-only\" aria-hidden=\"true\"\u003e \u00b7 \u003c\/span\u003e\u003ca href=\"#3902690\" data-sigil=\"has-tooltip\" data-meta=\"0_297\"\u003e\u003cspan class=\"screen-only\"\u003eJan 16 2018, 2:17 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-16 14:17:13 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_295\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_296\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_73\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003eI'll ask him about the difference between when images are finished loading and actually displayed on screen. Like if the difference is X seconds (as we seen before) that should influence the metric.\u003c\/p\u003e\n\n\u003cp\u003eI'll tried the plugin and it seems like the plugin doesn't work for us (images within the viewport isn't picked up): \u003cbr \/\u003e\n\u003cdiv class=\"phabricator-remarkup-embed-layout-left\"\u003e\u003ca href=\"https:\/\/phab.wmfusercontent.org\/file\/data\/mj43l3pv3qfb5jomepxz\/PHID-FILE-zs3xwlrs5cp3bwoj3gaw\/Screen_Shot_2018-01-17_at_9.44.58_AM.png\" class=\"phabricator-remarkup-embed-image\" data-sigil=\"lightboxable\" data-meta=\"0_3\"\u003e\u003cimg src=\"https:\/\/phab.wmfusercontent.org\/file\/data\/mj43l3pv3qfb5jomepxz\/PHID-FILE-zs3xwlrs5cp3bwoj3gaw\/Screen_Shot_2018-01-17_at_9.44.58_AM.png\" width=\"500\" alt=\"Screen Shot 2018-01-17 at 9.44.58 AM.png (1\u00d72 px, 1 MB)\" \/\u003e\u003c\/a\u003e\u003c\/div\u003e \u003cbr \/\u003e\nso we need to do a PR before we test\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_302\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/rus3onc75davarls6nbc\/PHID-FILE-d4tltleyv665iw455lvp\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Imarlier\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3909653\" id=\"3909653\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_301\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Imarlier\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_74\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Imarlier\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-fgnutei7gv7kn3w\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3909653\" data-sigil=\"has-tooltip\" data-meta=\"0_300\"\u003e\u003cspan class=\"screen-only\"\u003eJan 18 2018, 2:14 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-18 14:14:41 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_305\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3927800\" id=\"3927800\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_304\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_75\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-secgwnbwpmpu36h\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3927800\" data-sigil=\"has-tooltip\" data-meta=\"0_303\"\u003e\u003cspan class=\"screen-only\"\u003eJan 29 2018, 12:29 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-29 12:29:10 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_314\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3927812\" id=\"3927812\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_313\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_76\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3927812\" data-sigil=\"has-tooltip\" data-meta=\"0_312\"\u003e\u003cspan class=\"screen-only\"\u003eJan 29 2018, 12:55 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-29 12:55:45 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_310\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_311\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_77\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003e\u003ca href=\"http:\/\/ieeexplore.ieee.org\/stamp\/stamp.jsp?tp=&arnumber=7888987\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003e"Reordering Webpage Objects for Optimizing Quality-of-Experience" Li, Zhao, Min, Duan, Ni, Zhao 2017\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003eIn this study, researchers use machine learning to reorder HTML elements in order to improve ATF performance (similar to SpeedIndex).\u003c\/p\u003e\n\n\u003cp\u003eBasically they serve content from the top X websites in China with a server of their own, using Chrome Dev Tools for measurements, internet connection type simulation, etc. Something kind of odd in their methodology is that they rely on the name of CSS files and JS files to feed the machine learning model. Basically making a prediction, based only on the name of the CSS\/JS file of whether or not it will impact ATF. Resources that are predicted as not impacting ATF are moved to a random position in the HTML after the elements that affect ATF. Their method is quite elaborate, as they re-determined the ATF cutoff point after moving something.\u003c\/p\u003e\n\n\u003cp\u003eThey claim significant gains on ATF times. However, with their method I could easily see how above-the-fold content would be unchanged by a move, while below-the-fold content is affected, or broken, by the move of CSS\/JS elements in the HTML source. I will have to study the papers they refer to as the basis of their methodology to understand better whether or not it's a valid concern.\u003c\/p\u003e\n\n\u003cp\u003eAll in all, it seems understandable that they are patterns across websites in how JS\/CSS assets are named, that can carry meaning about whether or not they are high priority and necessary for the content above-the-fold, as well as asset names that convey that they're non-essential. And that through collective maintenance of those websites, the intention carried by those names hasn't necesserally translated in optimal position in the HTML source for the performance of the above-the-fold area.\u003c\/p\u003e\n\n\u003cp\u003eI wonder why they just didn't try random positioning of all CSS\/JS assets references in the HTML source to see if they could get similar results, or even better improvements.\u003c\/p\u003e\n\n\u003cp\u003eI would be curious to run Wikipedia articles through their model to see for myself what an optimized page would look like (does it break anything?), and whether the gains would be significant. I've written to the corresponding author to see if their code has been made available and if Wikipedia was part of the websites they tested in their study.\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_317\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-minor-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003ca name=\"3927813\" id=\"3927813\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-pencil phui-timeline-icon\" data-meta=\"0_316\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_78\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e updated the task description. \u003ca href=\"\/transactions\/detail\/PHID-XACT-TASK-fk64r5fj7zw7gal\/\" data-sigil=\"workflow\"\u003e(Show Details)\u003c\/a\u003e\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3927813\" data-sigil=\"has-tooltip\" data-meta=\"0_315\"\u003e\u003cspan class=\"screen-only\"\u003eJan 29 2018, 12:56 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-29 12:56:23 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-spacer\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-shell\" data-sigil=\"transaction anchor-container\" data-meta=\"0_326\"\u003e\u003cdiv class=\"phui-timeline-event-view phui-timeline-major-event\"\u003e\u003cdiv class=\"phui-timeline-content\"\u003e\u003ca style=\"background-image: url(https:\/\/phab.wmfusercontent.org\/file\/data\/abnv6m2xoqjroqyladvh\/PHID-FILE-yryhnwq73gr36rjgrz4m\/profile)\" class=\"visual-only phui-timeline-image\" href=\"\/p\/Gilles\/\" aria-hidden=\"true\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-wedge\" style=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"phui-timeline-group\"\u003e\u003cdiv class=\"phui-timeline-inner-content\"\u003e\u003ca name=\"3927863\" id=\"3927863\" class=\"phabricator-anchor-view\"\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-title phui-timeline-title-with-icon phui-timeline-title-with-menu\"\u003e\u003cspan class=\"phui-timeline-icon-fill\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-comment phui-timeline-icon\" data-meta=\"0_325\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003ca href=\"\/p\/Gilles\/\" class=\"phui-handle handle-availability-disabled phui-link-person\" data-sigil=\"hovercard\" data-meta=\"0_79\"\u003e\u003cspan class=\"perfect-circle\"\u003e\u2022\u003c\/span\u003e Gilles\u003c\/a\u003e added a comment.\u003cspan class=\"phui-timeline-extra\"\u003e\u003ca href=\"#3927863\" data-sigil=\"has-tooltip\" data-meta=\"0_324\"\u003e\u003cspan class=\"screen-only\"\u003eJan 29 2018, 2:09 PM\u003c\/span\u003e\u003cspan class=\"print-only\" aria-hidden=\"true\"\u003e2018-01-29 14:09:22 (UTC+0)\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\u003ca href=\"#\" class=\"phui-timeline-menu\" aria-haspopup=\"true\" aria-expanded=\"false\" data-sigil=\"phui-dropdown-menu\" data-meta=\"0_322\"\u003e\u003cspan class=\"aural-only\"\u003eComment Actions\u003c\/span\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-caret-down\" data-meta=\"0_323\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cdiv class=\"phui-timeline-core-content\"\u003e\u003cspan class=\"transaction-comment\" data-sigil=\"transaction-comment\" data-meta=\"0_80\"\u003e\u003cdiv class=\"phabricator-remarkup\"\u003e\u003cp\u003e\u003ca href=\"https:\/\/homes.cs.washington.edu\/~arvind\/papers\/wprof.pdf\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003e"Demystifying Page Load Performance with WProf" Wang, Balasubramanian, Krishnamurthy, Wetherall 2013\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003ePretty amazing work. They start out by studying browser dependency policies through experiment, whereby they design a bunch of test pages combining the many types of possible assets on an html page, and artificially slowing some down to infer hard dependencies. They also look at the source code of browsers that are open source to complete the information they gather through theses experiments.\u003c\/p\u003e\n\n\u003cp\u003eOf course what they find out about each browser's mechanics is outdated, since the study is from 2013, but the method is interesting and could be worth reproducing for a more up-to-date view on how browsers behave nowadays.\u003c\/p\u003e\n\n\u003cp\u003eAfter this they move onto implementing a fork of Chrome 22 (then Webkit-based), which integrates their lightweight profiler designed to identify dependency-related performance bottlenecks in the critical path.\u003c\/p\u003e\n\n\u003cp\u003eThey subsequently run their profiler on 150 of the top 200 Alexa websites, with bandwidth capped at 10Mpbs. Their definition of page load time is based on the DOMLoad event, because they don't want to deal with the overhead of video recording for ATF\/SpeedIndex.\u003c\/p\u003e\n\n\u003cp\u003eOne key finding is that 35% of the time spent in the critical path for page load time is spent in computation activities, with HTML parsing being the most expensive and CSS evaluation and rendering the least (to the point of being considered negligible).\u003c\/p\u003e\n\n\u003cp\u003eAnother interesting finding is when compared cold vs hot loads, the critical path gains obtained by caching aren't proportional to the bytes saved. Eg. having 90% of cached objects only decreased page load time by 40%. This is mostly explained by the fact that most sites will cache things that aren't in the critical path better than things that are.\u003c\/p\u003e\n\n\u003cp\u003eCaching also reduces computation cost. Their theory being that browsers won't just cached a piece of content, but also intermediary parsing artifacts associated with it, that it won't redo on cache hit.\u003c\/p\u003e\n\n\u003cp\u003eThey also test on slower computers and quite obviously in that situation computation takes an even bigger share of the critical path time.\u003c\/p\u003e\n\n\u003cp\u003eThey have \u003ca href=\"http:\/\/wprof.cs.washington.edu\/\" class=\"remarkup-link\" target=\"_blank\" rel=\"noreferrer\"\u003ea website with all the tools and tests from this study\u003c\/a\u003e. I'll file a subtask to try it out on Wikipedia articles.\u003c\/p\u003e\u003c\/div\u003e\u003c\/span\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e"},"javelin_metadata":[{"hovercardSpec":{"objectPHID":"PHID-USER-papbtlagfolot4dzerne"}},{"hovercardSpec":{"objectPHID":"PHID-TASK-ce2ijxs3cno7sozjw2xb"}},{"hovercardSpec":{"objectPHID":"PHID-TASK-cjo5ro6dnaao4n2xlho3"}},{"phid":"PHID-FILE-zs3xwlrs5cp3bwoj3gaw","uri":"https:\/\/phab.wmfusercontent.org\/file\/data\/mj43l3pv3qfb5jomepxz\/PHID-FILE-zs3xwlrs5cp3bwoj3gaw\/Screen_Shot_2018-01-17_at_9.44.58_AM.png","dUri":"https:\/\/phab.wmfusercontent.org\/file\/download\/mj43l3pv3qfb5jomepxz\/PHID-FILE-zs3xwlrs5cp3bwoj3gaw\/Screen_Shot_2018-01-17_at_9.44.58_AM.png","alt":"Screen Shot 2018-01-17 at 9.44.58 AM.png (1\u00d72 px, 1 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style=\"\"\u003e\u003ca href=\"\/transactions\/history\/PHID-XACT-TASK-ickmjayjizosvcr\/\" class=\"phabricator-action-view-item\" data-sigil=\"workflow\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-list phabricator-action-view-icon\" data-meta=\"0_135\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Edit History\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e"},[],{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-ickmjayjizosvcr","anchor":"3867099"},{"targetID":"UQ0_1","uri":"\/transactions\/quote\/PHID-XACT-TASK-3r5tqsrt7ljc2xr\/","ref":"T165272#3871298"},[],{"anchor":"3871298"},[],{"items":"\u003cul class=\"phabricator-action-list-view \"\u003e\u003cli id=\"UQ0_17\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"#\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-quote\" data-meta=\"0_141\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-quote-left phabricator-action-view-icon\" data-meta=\"0_142\" aria-hidden=\"true\"\u003e\u003c\/span\u003eQuote Comment\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_19\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/raw\/PHID-XACT-TASK-3r5tqsrt7ljc2xr\/\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-raw\" data-meta=\"0_143\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-code phabricator-action-view-icon\" data-meta=\"0_144\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Raw Remarkup\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e"},[],{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-3r5tqsrt7ljc2xr","anchor":"3871298"},{"targetID":"UQ0_1","uri":"\/transactions\/quote\/PHID-XACT-TASK-3hj6quap63pcfkz\/","ref":"T165272#3871419"},[],{"anchor":"3871419"},[],[],{"items":"\u003cul class=\"phabricator-action-list-view \"\u003e\u003cli id=\"UQ0_21\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"#\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-quote\" data-meta=\"0_150\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-quote-left phabricator-action-view-icon\" data-meta=\"0_151\" aria-hidden=\"true\"\u003e\u003c\/span\u003eQuote Comment\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_23\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/raw\/PHID-XACT-TASK-3hj6quap63pcfkz\/\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-raw\" data-meta=\"0_152\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-code phabricator-action-view-icon\" data-meta=\"0_153\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Raw Remarkup\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_25\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/history\/PHID-XACT-TASK-3hj6quap63pcfkz\/\" class=\"phabricator-action-view-item\" data-sigil=\"workflow\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-list phabricator-action-view-icon\" data-meta=\"0_154\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Edit History\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e"},[],{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-3hj6quap63pcfkz","anchor":"3871419"},{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-6jjiy6abcrtt74j","anchor":"3871447"},{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-tyagd2wbapmtqyv","anchor":"3871526"},{"tip":"Via Web"},[],[],{"phid":"PHID-XACT-TASK-4jn7qg7zz5mgppk","anchor":"3871763"},{"targetID":"UQ0_1","uri":"\/transactions\/quote\/PHID-XACT-TASK-xtfipsfean6uqem\/","ref":"T165272#3885773"},[],{"anchor":"3885773"},[],{"items":"\u003cul class=\"phabricator-action-list-view \"\u003e\u003cli id=\"UQ0_27\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"#\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-quote\" data-meta=\"0_170\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-quote-left phabricator-action-view-icon\" data-meta=\"0_171\" aria-hidden=\"true\"\u003e\u003c\/span\u003eQuote Comment\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_29\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/raw\/PHID-XACT-TASK-xtfipsfean6uqem\/\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-raw\" data-meta=\"0_172\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-code phabricator-action-view-icon\" data-meta=\"0_173\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Raw Remarkup\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e"},[],{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-xtfipsfean6uqem","anchor":"3885773"},{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-w3ktbgxruixch3c","anchor":"3885774"},{"targetID":"UQ0_1","uri":"\/transactions\/quote\/PHID-XACT-TASK-sw4mbld4catlkpu\/","ref":"T165272#3885953"},[],{"anchor":"3885953"},[],[],{"items":"\u003cul class=\"phabricator-action-list-view \"\u003e\u003cli id=\"UQ0_31\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"#\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-quote\" data-meta=\"0_182\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-quote-left phabricator-action-view-icon\" data-meta=\"0_183\" aria-hidden=\"true\"\u003e\u003c\/span\u003eQuote Comment\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_33\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/raw\/PHID-XACT-TASK-sw4mbld4catlkpu\/\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-raw\" data-meta=\"0_184\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-code phabricator-action-view-icon\" data-meta=\"0_185\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Raw Remarkup\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_35\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/history\/PHID-XACT-TASK-sw4mbld4catlkpu\/\" class=\"phabricator-action-view-item\" data-sigil=\"workflow\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-list phabricator-action-view-icon\" data-meta=\"0_186\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Edit History\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e"},[],{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-sw4mbld4catlkpu","anchor":"3885953"},{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-roh6fvtcjmi5k3a","anchor":"3885954"},{"targetID":"UQ0_1","uri":"\/transactions\/quote\/PHID-XACT-TASK-rkyii726a7yzb4r\/","ref":"T165272#3886357"},[],{"anchor":"3886357"},[],[],{"items":"\u003cul class=\"phabricator-action-list-view \"\u003e\u003cli id=\"UQ0_37\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"#\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-quote\" data-meta=\"0_195\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-quote-left phabricator-action-view-icon\" data-meta=\"0_196\" aria-hidden=\"true\"\u003e\u003c\/span\u003eQuote Comment\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_39\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/raw\/PHID-XACT-TASK-rkyii726a7yzb4r\/\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-raw\" data-meta=\"0_197\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-code phabricator-action-view-icon\" data-meta=\"0_198\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Raw Remarkup\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_41\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/history\/PHID-XACT-TASK-rkyii726a7yzb4r\/\" class=\"phabricator-action-view-item\" data-sigil=\"workflow\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-list phabricator-action-view-icon\" data-meta=\"0_199\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Edit History\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e"},[],{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-rkyii726a7yzb4r","anchor":"3886357"},{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-aqrxwoy3uoqmf5e","anchor":"3886360"},{"targetID":"UQ0_1","uri":"\/transactions\/quote\/PHID-XACT-TASK-dmnyrk4cs3nldlh\/","ref":"T165272#3886400"},[],{"anchor":"3886400"},[],{"items":"\u003cul class=\"phabricator-action-list-view \"\u003e\u003cli id=\"UQ0_43\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"#\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-quote\" data-meta=\"0_208\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-quote-left phabricator-action-view-icon\" data-meta=\"0_209\" aria-hidden=\"true\"\u003e\u003c\/span\u003eQuote Comment\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_45\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/raw\/PHID-XACT-TASK-dmnyrk4cs3nldlh\/\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-raw\" data-meta=\"0_210\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-code phabricator-action-view-icon\" data-meta=\"0_211\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Raw Remarkup\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e"},[],{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-dmnyrk4cs3nldlh","anchor":"3886400"},{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-o5rhcz4tlkmfyci","anchor":"3886414"},{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-ppcmvs3g7pqbhgg","anchor":"3890960"},{"tip":"Via Herald"},[],{"phid":"PHID-XACT-TASK-knwe4xoz322aclo","anchor":"3890961"},{"targetID":"UQ0_1","uri":"\/transactions\/quote\/PHID-XACT-TASK-crws6gv3ednfuf5\/","ref":"T165272#3893389"},[],{"anchor":"3893389"},[],{"items":"\u003cul class=\"phabricator-action-list-view \"\u003e\u003cli id=\"UQ0_47\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"#\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-quote\" data-meta=\"0_226\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-quote-left phabricator-action-view-icon\" data-meta=\"0_227\" aria-hidden=\"true\"\u003e\u003c\/span\u003eQuote Comment\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_49\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/raw\/PHID-XACT-TASK-crws6gv3ednfuf5\/\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-raw\" data-meta=\"0_228\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-code phabricator-action-view-icon\" data-meta=\"0_229\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Raw Remarkup\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e"},[],{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-crws6gv3ednfuf5","anchor":"3893389"},{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-f4khgvrzjbay7w5","anchor":"3893390"},{"targetID":"UQ0_1","uri":"\/transactions\/quote\/PHID-XACT-TASK-adcsf75l32gkjdv\/","ref":"T165272#3896221"},[],{"anchor":"3896221"},[],[],{"items":"\u003cul class=\"phabricator-action-list-view \"\u003e\u003cli id=\"UQ0_51\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"#\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-quote\" data-meta=\"0_238\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-quote-left phabricator-action-view-icon\" data-meta=\"0_239\" aria-hidden=\"true\"\u003e\u003c\/span\u003eQuote Comment\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_53\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/raw\/PHID-XACT-TASK-adcsf75l32gkjdv\/\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-raw\" data-meta=\"0_240\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-code phabricator-action-view-icon\" data-meta=\"0_241\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Raw Remarkup\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_55\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/history\/PHID-XACT-TASK-adcsf75l32gkjdv\/\" class=\"phabricator-action-view-item\" data-sigil=\"workflow\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-list phabricator-action-view-icon\" data-meta=\"0_242\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Edit History\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e"},[],{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-adcsf75l32gkjdv","anchor":"3896221"},{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-hbubfhktvd2xwqt","anchor":"3896222"},{"targetID":"UQ0_1","uri":"\/transactions\/quote\/PHID-XACT-TASK-uhssl43dhwht6il\/","ref":"T165272#3896375"},[],{"anchor":"3896375"},[],{"items":"\u003cul class=\"phabricator-action-list-view \"\u003e\u003cli id=\"UQ0_57\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"#\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-quote\" data-meta=\"0_251\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-quote-left phabricator-action-view-icon\" data-meta=\"0_252\" aria-hidden=\"true\"\u003e\u003c\/span\u003eQuote Comment\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_59\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/raw\/PHID-XACT-TASK-uhssl43dhwht6il\/\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-raw\" data-meta=\"0_253\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-code phabricator-action-view-icon\" data-meta=\"0_254\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Raw Remarkup\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e"},[],{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-uhssl43dhwht6il","anchor":"3896375"},{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-dwzblzhkvesjpry","anchor":"3896396"},{"targetID":"UQ0_1","uri":"\/transactions\/quote\/PHID-XACT-TASK-7xebpvf7yutaskh\/","ref":"T165272#3896475"},[],{"anchor":"3896475"},[],{"items":"\u003cul class=\"phabricator-action-list-view \"\u003e\u003cli id=\"UQ0_61\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"#\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-quote\" data-meta=\"0_263\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-quote-left phabricator-action-view-icon\" data-meta=\"0_264\" aria-hidden=\"true\"\u003e\u003c\/span\u003eQuote Comment\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_63\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/raw\/PHID-XACT-TASK-7xebpvf7yutaskh\/\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-raw\" data-meta=\"0_265\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-code phabricator-action-view-icon\" data-meta=\"0_266\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Raw Remarkup\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e"},[],{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-7xebpvf7yutaskh","anchor":"3896475"},{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-fbsa65fhc73uox6","anchor":"3896477"},{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-fm5iho4lqef52lc","anchor":"3896732"},{"targetID":"UQ0_1","uri":"\/transactions\/quote\/PHID-XACT-TASK-ry6ixlhuineplpa\/","ref":"T165272#3896905"},[],{"anchor":"3896905"},[],{"items":"\u003cul class=\"phabricator-action-list-view \"\u003e\u003cli id=\"UQ0_65\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"#\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-quote\" data-meta=\"0_278\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-quote-left phabricator-action-view-icon\" data-meta=\"0_279\" aria-hidden=\"true\"\u003e\u003c\/span\u003eQuote Comment\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_67\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/raw\/PHID-XACT-TASK-ry6ixlhuineplpa\/\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-raw\" data-meta=\"0_280\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-code phabricator-action-view-icon\" data-meta=\"0_281\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Raw Remarkup\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e"},[],{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-ry6ixlhuineplpa","anchor":"3896905"},{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-umkonftuz377l6t","anchor":"3896909"},{"targetID":"UQ0_1","uri":"\/transactions\/quote\/PHID-XACT-TASK-352fxnsibx7ufpq\/","ref":"T165272#3902690"},[],{"anchor":"3902690"},[],[],{"items":"\u003cul class=\"phabricator-action-list-view \"\u003e\u003cli id=\"UQ0_69\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"#\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-quote\" data-meta=\"0_290\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-quote-left phabricator-action-view-icon\" data-meta=\"0_291\" aria-hidden=\"true\"\u003e\u003c\/span\u003eQuote Comment\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_71\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/raw\/PHID-XACT-TASK-352fxnsibx7ufpq\/\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-raw\" data-meta=\"0_292\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-code phabricator-action-view-icon\" data-meta=\"0_293\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Raw Remarkup\u003c\/a\u003e\u003c\/li\u003e\u003cli id=\"UQ0_73\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"\/transactions\/history\/PHID-XACT-TASK-352fxnsibx7ufpq\/\" class=\"phabricator-action-view-item\" data-sigil=\"workflow\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-list phabricator-action-view-icon\" data-meta=\"0_294\" aria-hidden=\"true\"\u003e\u003c\/span\u003eView Edit History\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e"},[],{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-352fxnsibx7ufpq","anchor":"3902690"},{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-fgnutei7gv7kn3w","anchor":"3909653"},{"tip":"Via Web"},[],{"phid":"PHID-XACT-TASK-secgwnbwpmpu36h","anchor":"3927800"},{"targetID":"UQ0_1","uri":"\/transactions\/quote\/PHID-XACT-TASK-tz6bn5aqsad7wfl\/","ref":"T165272#3927812"},[],{"anchor":"3927812"},[],{"items":"\u003cul class=\"phabricator-action-list-view \"\u003e\u003cli id=\"UQ0_75\" class=\"phabricator-action-view phabricator-action-view-href action-has-icon\" style=\"\"\u003e\u003ca href=\"#\" class=\"phabricator-action-view-item\" data-sigil=\"transaction-quote\" data-meta=\"0_306\"\u003e\u003cspan class=\"visual-only phui-icon-view phui-font-fa fa-quote-left phabricator-action-view-icon\" data-meta=\"0_307\" aria-hidden=\"true\"\u003e\u003c\/span\u003eQuote 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