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Gilles (Gilles Dubuc)
Senior Performance Engineer, WMFAdministrator

Today

  • Clear sailing ahead.

Tomorrow

  • Clear sailing ahead.

Friday

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User Details

User Since
Oct 7 2014, 8:24 AM (277 w, 1 d)
Roles
Administrator
Availability
Available
IRC Nick
gilles
LDAP User
Gilles
MediaWiki User
GDubuc (WMF) [ Global Accounts ]

Recent Activity

Yesterday

Gilles assigned T243762: Daily errors on webperf1002 & webperf2002 /usr/local/bin/arclamp-generate-svgs > /dev/null to dpifke.
Tue, Jan 28, 11:26 PM · Patch-For-Review, Wikimedia-production-error, Arc-Lamp, Performance-Team, Operations
Gilles triaged T243865: Add alerting for performance perception survey as Low priority.
Tue, Jan 28, 11:26 PM · Patch-For-Review, Performance-Team
Gilles moved T243762: Daily errors on webperf1002 & webperf2002 /usr/local/bin/arclamp-generate-svgs > /dev/null from Inbox to Doing on the Performance-Team board.
Tue, Jan 28, 11:24 PM · Patch-For-Review, Wikimedia-production-error, Arc-Lamp, Performance-Team, Operations
Gilles moved T243865: Add alerting for performance perception survey from Inbox to Doing on the Performance-Team board.
Tue, Jan 28, 11:24 PM · Patch-For-Review, Performance-Team
Gilles created T243865: Add alerting for performance perception survey.
Tue, Jan 28, 10:44 PM · Patch-For-Review, Performance-Team
Gilles added a comment to T123582: Use "preconnect" resource hint for thumbnail host.

I think we should try the non-smart version for a bit (serving the link no matter what, even for articles without images) and look at the effect in the wild.

Tue, Jan 28, 10:19 PM · Performance-Team, MediaWiki-General, Multimedia

Tue, Jan 21

Gilles moved T242895: Safari crashes on some click handling events for banners that move the centralNotice element outside of the the main body from Inbox to Radar on the Performance-Team board.
Tue, Jan 21, 9:27 PM · Performance-Team (Radar), Readers-Web-Backlog, MinervaNeue (Tracking), Fundraising-Backlog, MediaWiki-extensions-CentralNotice

Thu, Jan 9

Gilles created M294: Perf burnup.
Thu, Jan 9, 8:37 PM

Wed, Jan 8

Gilles added a comment to T242189: Requesting access to production servers in perf-team group for dpifke.

I approve this request 🦄

Wed, Jan 8, 6:11 PM · Operations, SRE-Access-Requests

Tue, Jan 7

Gilles assigned T200108: Increase retention of ArcLamp to 2 years to dpifke.
Tue, Jan 7, 11:43 AM · Arc-Lamp, Performance-Team
Gilles closed T205723: Prepare materials for internal Navigation Timing (RUM) presentation as Declined.
Tue, Jan 7, 11:43 AM · Performance-Team
Gilles closed T206581: Write about WikimediaDebug on the blog/wikitech-l as Resolved.
Tue, Jan 7, 11:42 AM · Performance-Team
Gilles assigned T158837: Consolidate performance website and related software to dpifke.
Tue, Jan 7, 11:41 AM · Patch-For-Review, observability, Performance-Team, Operations
Gilles assigned T203060: Evaluate deploying synthetic testing on bare metal to dpifke.
Tue, Jan 7, 11:40 AM · Performance-Team
Gilles assigned T188204: Test and create a WPT Agent on Cloud VPS to dpifke.
Tue, Jan 7, 11:39 AM · WebPageTest, Performance-Team
Gilles reassigned T224896: Deploy and test WebPageTest agent in Cape Town (early 2020) from Peter to dpifke.
Tue, Jan 7, 11:39 AM · Performance-Team, WebPageTest
Gilles assigned T215740: Create Icinga check for ArcLamp (xenon-log) service health to dpifke.
Tue, Jan 7, 11:39 AM · Arc-Lamp, observability, Wikimedia-Incident, Performance-Team
Gilles assigned T225742: Send logs from webperf processor services to Logstash to dpifke.
Tue, Jan 7, 11:38 AM · Wikimedia-Logstash, observability, Performance-Team
Gilles assigned T225740: Create Icinga check for Coal service health to dpifke.
Tue, Jan 7, 11:38 AM · observability, Performance-Team
Gilles assigned T225739: Create Icinga check for navtiming.py service health to dpifke.
Tue, Jan 7, 11:38 AM · MediaWiki-extensions-NavigationTiming, observability, Performance-Team
Gilles assigned T227026: Deploy ArcLamp process as stateless/scalable service (Kubernetes) to dpifke.
Tue, Jan 7, 11:38 AM · Arc-Lamp, Performance-Team
Gilles assigned T230037: Create warmup procedure for MediaWiki app servers to dpifke.
Tue, Jan 7, 11:37 AM · Release-Engineering-Team, serviceops, Performance-Team
Gilles assigned T233713: Test running performance tests in Kubernetes to dpifke.
Tue, Jan 7, 11:36 AM · WebPageReplay, Performance-Team
Gilles assigned T175087: Create a navtiming processor for Prometheus to dpifke.
Tue, Jan 7, 11:36 AM · Performance-Team
Gilles assigned T200109: Move Arc Lamp code to a Scap-deployed repository to dpifke.
Tue, Jan 7, 11:35 AM · Patch-For-Review, Arc-Lamp, Performance-Team
Gilles reassigned T214026: Create a list of what's needed for getting the mobile phone performance lab running from Peter to dpifke.
Tue, Jan 7, 11:34 AM · Performance-Team
Gilles assigned T234103: Try performance tune one of the AWS instances to dpifke.
Tue, Jan 7, 11:32 AM · WebPageReplay, Performance-Team
Gilles assigned T233884: Decom the ArcLamp pipeline for HHVM/Xenon to dpifke.
Tue, Jan 7, 11:32 AM · serviceops, Performance-Team, Arc-Lamp
Gilles reassigned T235604: Send errors to IRC for the new synthetic testing setup from Peter to dpifke.
Tue, Jan 7, 11:31 AM · WebPageReplay, WebPageTest, Performance-Team
Gilles reassigned T237359: Smarter AWS alerts from Peter to dpifke.
Tue, Jan 7, 11:31 AM · WebPageTest, WebPageReplay, Performance-Team
Gilles reassigned T237506: Test AWS alarms from Peter to dpifke.
Tue, Jan 7, 11:30 AM · WebPageReplay, WebPageTest, Performance-Team
Gilles assigned T235481: Backups for arclamp application data to dpifke.
Tue, Jan 7, 11:28 AM · serviceops, Performance-Team, Arc-Lamp
Gilles closed T241976: Thai calendar dates on arabic wikipedia causing errors in Google Search Console as Resolved.

I presume the googlebot that looks for metadata errors just happened to randomly discover that page. Anyway, thanks for fixing this!

Tue, Jan 7, 11:14 AM
Gilles added a comment to T241976: Thai calendar dates on arabic wikipedia causing errors in Google Search Console.

I left a comment on the talk page: https://ar.wikipedia.org/wiki/%D9%86%D9%82%D8%A7%D8%B4:%D8%A8%D8%B7%D9%88%D9%84%D8%A9_%D8%A7%D9%84%D8%B9%D8%A7%D9%84%D9%85_%D9%84%D9%83%D8%B1%D8%A9_%D8%A7%D9%84%D9%82%D8%AF%D9%85_%D8%AF%D8%A7%D8%AE%D9%84_%D8%A7%D9%84%D8%B5%D8%A7%D9%84%D8%A7%D8%AA_2008#This_article_contains_dates_and_text_in_Thai

Tue, Jan 7, 8:42 AM
Gilles renamed T241976: Thai calendar dates on arabic wikipedia causing errors in Google Search Console from Arabic calendar dates causing errors in Google Search Console to Thai calendar dates on arabic wikipedia causing errors in Google Search Console.
Tue, Jan 7, 8:38 AM
Gilles added a comment to T241976: Thai calendar dates on arabic wikipedia causing errors in Google Search Console.

Actually, this is very on topic! It made me realise that 2551 is the Thai calendar year, the islamic calendar is actually behind, it should be 1428. 2008 in Gregorian.

Tue, Jan 7, 8:37 AM

Mon, Jan 6

Gilles moved T240978: Performance review of Wikipedia KaiOS app from Inbox to Next In This Quarter / Jan-Mar 2020 on the Performance-Team board.
Mon, Jan 6, 10:26 PM · Inuka-Team, Performance-Team
Gilles moved T203935: Support Save-Data header from Inbox to Backlog: Small & Maintenance on the Performance-Team board.
Mon, Jan 6, 10:23 PM · Performance-Team, Core Platform Team Legacy (Watching / External), Product-Infrastructure-Team-Backlog, Readers-Web-Backlog (Tracking), MobileFrontend
Gilles moved T226337: SpecialConfirmEmail causes "MWException: CAS update failed on user_touched" from User.php from Inbox to Radar on the Performance-Team board.
Mon, Jan 6, 10:18 PM · Core Platform Team Workboards (Clinic Duty Team), Performance-Team (Radar), Core Platform Team, Availability, Wikimedia-production-error, MediaWiki-User-preferences
Gilles moved T234868: Mobile VE no longer restores section hash fragment after section editing from Inbox to Radar on the Performance-Team board.
Mon, Jan 6, 10:16 PM · MW-1.35-notes (1.35.0-wmf.18; 2020-02-04), MinervaNeue (Tracking), Readers-Web-Backlog (Kanbanana-2019-20-Q3), VisualEditor (Current work), Patch-For-Review, VisualEditor-MediaWiki
Gilles moved T241097: Stack for shutdown/destruct fatals missing from php7-fatal-error.php logs from Inbox to Doing on the Performance-Team board.
Mon, Jan 6, 10:15 PM · serviceops, Performance-Team
Gilles assigned T241097: Stack for shutdown/destruct fatals missing from php7-fatal-error.php logs to aaron.
Mon, Jan 6, 10:15 PM · serviceops, Performance-Team
Gilles moved T241139: ResourceLoader should flush CSS in smaller chunks from Inbox to Backlog: Future Goals on the Performance-Team board.
Mon, Jan 6, 10:12 PM · Readers-Web-Backlog (Tracking), MediaWiki-ResourceLoader, Performance-Team
Gilles moved T241145: Improve ATS backend connection reuse against origin servers from Inbox to Radar on the Performance-Team board.
Mon, Jan 6, 10:09 PM · Performance-Team (Radar), Patch-For-Review, Traffic, Operations
Gilles changed the edit policy for The Speed of Thought.
Mon, Jan 6, 9:57 PM · Performance-Team
Gilles updated the task description for T241976: Thai calendar dates on arabic wikipedia causing errors in Google Search Console.
Mon, Jan 6, 6:22 PM
Gilles updated the task description for T241976: Thai calendar dates on arabic wikipedia causing errors in Google Search Console.
Mon, Jan 6, 6:22 PM
Gilles removed a project from T241976: Thai calendar dates on arabic wikipedia causing errors in Google Search Console: Parsoid-PHP.
Mon, Jan 6, 6:22 PM
Gilles triaged T239577: Record navigator.hardwareConcurrency in navtiming as Medium priority.
Mon, Jan 6, 1:18 PM · Patch-For-Review, MediaWiki-extensions-NavigationTiming, Performance-Team
Gilles triaged T228467: thumbtime/seek thumbnailing broken with floating point offsets as Low priority.
Mon, Jan 6, 1:18 PM · Performance-Team, Patch-For-Review, Regression, Thumbor
Gilles triaged T240201: Performance review of GrowthExperiments extension, Special:Homepage Suggested Edits module as Medium priority.
Mon, Jan 6, 1:18 PM · GrowthExperiments-NewcomerTasks, Growth-Team (Current Sprint), Performance-Team
Gilles triaged T239982: Investigate why the wlm_2019_de banner increased the p95 FID from 25 to 275ms as Medium priority.
Mon, Jan 6, 1:17 PM · Performance-Team
Gilles triaged T240323: Reproduce p25 experience in US and India as Medium priority.
Mon, Jan 6, 1:17 PM · Performance-Team
Gilles lowered the priority of T230897: Measure the impact of native image lazy loading on desktop from Medium to Lowest.
Mon, Jan 6, 1:17 PM · MW-1.34-notes (1.34.0-wmf.20; 2019-08-27), Core Platform Team Workboards (Clinic Duty Team), Performance-Team
Gilles triaged T240474: Performance review for the DiscussionTools extension as Lowest priority.

Please bump/reset priority once the task is filled out

Mon, Jan 6, 1:16 PM · Performance-Team, Editing-team, DiscussionTools
Gilles lowered the priority of T236240: Ghostscript outputs errors to stdout despite -q, preventing Thumbor from generating some thumbnails properly from Medium to Low.
Mon, Jan 6, 1:16 PM · Traffic, Operations, Thumbor, MediaWiki-File-management, Commons, Multimedia
Gilles lowered the priority of T226707: cwebp chokes on YCCK JPGs from Medium to Low.
Mon, Jan 6, 1:16 PM · Thumbor, Performance-Team
Gilles lowered the priority of T226707: cwebp chokes on YCCK JPGs from High to Medium.
Mon, Jan 6, 1:15 PM · Thumbor, Performance-Team
Gilles claimed T238091: Collect First Input Timing.
Mon, Jan 6, 1:15 PM · Performance-Team
Gilles added a comment to T226707: cwebp chokes on YCCK JPGs.

@jijiki as far as I can tell, this was never roll-deployed?

Mon, Jan 6, 1:12 PM · Thumbor, Performance-Team
Gilles added a comment to T241976: Thai calendar dates on arabic wikipedia causing errors in Google Search Console.

@alanajjar Is it common for arwiki articles like this one to use the islamic calendar? I see at the bottom that the categories are Gregorian years. The issue would certainly go away if those dates were converted to Gregorian years in the affected article. The error Google reported is only for that article, but I see no edits on December 26. Maybe a template changed?

Mon, Jan 6, 12:46 PM
Gilles created T241976: Thai calendar dates on arabic wikipedia causing errors in Google Search Console.
Mon, Jan 6, 9:34 AM

Dec 20 2019

Gilles added a comment to T237605: Create kerberos principals for users.

In a brilliant move, I have already forgotten which password I set and did not write it down. What's the procedure to initiate a password reset?

Dec 20 2019, 10:54 AM · Patch-For-Review, Analytics-Kanban, Analytics
Gilles renamed T241139: ResourceLoader should flush CSS in smaller chunks from Long task on mobile to ResourceLoader should chunk up CSS it adds to the page (more).
Dec 20 2019, 8:50 AM · Readers-Web-Backlog (Tracking), MediaWiki-ResourceLoader, Performance-Team
Gilles added a comment to T241139: ResourceLoader should flush CSS in smaller chunks.

It's ResourceLoader loading a bunch of CSS.

Dec 20 2019, 8:45 AM · Readers-Web-Backlog (Tracking), MediaWiki-ResourceLoader, Performance-Team

Dec 19 2019

Gilles added a comment to T196558: Send X-Analytics information from Varnish to Hadoop with VCL_Log.

Since the migration work is starting in Q3, it sounds like this task would be obsolete at some point in 2020, right? I guess as part of the migration it would be nice to make it a requirement to get rid of those headers being sent to end users, granted that ATS is capable of doing that.

Dec 19 2019, 10:15 AM · Operations, Traffic, Performance-Team (Radar), Analytics

Dec 17 2019

Gilles assigned T240978: Performance review of Wikipedia KaiOS app to Krinkle.
Dec 17 2019, 7:05 PM · Inuka-Team, Performance-Team
Gilles added a comment to T237605: Create kerberos principals for users.

I would like to retain my ability to access Hadoop from the stat* hosts 🙃 My shell name is gilles

Dec 17 2019, 10:48 AM · Patch-For-Review, Analytics-Kanban, Analytics

Dec 16 2019

Gilles moved T240323: Reproduce p25 experience in US and India from Inbox to Doing on the Performance-Team board.
Dec 16 2019, 9:04 PM · Performance-Team
Gilles moved T240474: Performance review for the DiscussionTools extension from Inbox to Backlog: Future Goals on the Performance-Team board.
Dec 16 2019, 9:04 PM · Performance-Team, Editing-team, DiscussionTools
Gilles claimed T240474: Performance review for the DiscussionTools extension.

Body of the template coming later in the quarter, I assume?

Dec 16 2019, 9:03 PM · Performance-Team, Editing-team, DiscussionTools
Gilles moved T240626: Performance review of client-side-only version of Graph extension from Inbox to Backlog: Future Goals on the Performance-Team board.
Dec 16 2019, 9:02 PM · Performance-Team
Gilles assigned T240626: Performance review of client-side-only version of Graph extension to Peter.
Dec 16 2019, 9:01 PM · Performance-Team
Gilles renamed T238091: Collect First Input Timing from We should track First Input Delay (FID) in our RUM metrics to Collect First Input Timing.
Dec 16 2019, 1:41 PM · Performance-Team
Gilles added a comment to T239295: Placeholder: Run display locking origin trial.

Yep, here's an example for 3: https://gerrit.wikimedia.org/r/#/c/operations/mediawiki-config/+/504501/

Dec 16 2019, 1:41 PM · Readers-Web-Backlog (Kanbanana-2019-20-Q3), Patch-For-Review, MobileFrontend (MobileFrontend and MinervaNeue architecture)

Dec 13 2019

Gilles added a comment to T240323: Reproduce p25 experience in US and India.

Yeah, that works

Dec 13 2019, 12:14 PM · Performance-Team
Gilles added a comment to T239295: Placeholder: Run display locking origin trial.

Yeah the origin trial token header can act as the feature flag for something like this. Just tripled check that this doesn't break anything on a browser that doesn't support this feature.

Dec 13 2019, 12:09 PM · Readers-Web-Backlog (Kanbanana-2019-20-Q3), Patch-For-Review, MobileFrontend (MobileFrontend and MinervaNeue architecture)
Gilles added a comment to T240323: Reproduce p25 experience in US and India.

Did you make sure that the jsfiddle page was already loaded and pressed "run" on there? Otherwise when the benchmark runs during the full pageload I think the iframe competes too much with the rest and the scores are much higher.

Dec 13 2019, 12:06 PM · Performance-Team
Gilles added a comment to T240323: Reproduce p25 experience in US and India.

I've just received the Motorola phone and it feels pretty fast (of course it's pretty empty since I've just set it up).

Dec 13 2019, 11:26 AM · Performance-Team
Gilles closed T217318: A Large-scale Study of Wikipedia Users' Quality of Experience: data release as Resolved.

Fantastic, thank you very much!

Dec 13 2019, 9:51 AM · Privacy, Security-Team, WMF-Legal, Analytics, Performance-Team

Dec 12 2019

Gilles reassigned T217318: A Large-scale Study of Wikipedia Users' Quality of Experience: data release from Gilles to Slaporte.
Dec 12 2019, 9:48 AM · Privacy, Security-Team, WMF-Legal, Analytics, Performance-Team
Gilles added a comment to T239724: Fatal error: "Object does not support method calls" (from MemcachedPeclBagOStuff).

Are those all happening on requests that are timing out (and killed as a result)?

Dec 12 2019, 8:26 AM · Core Platform Team Workboards (Architecture Review Workboard), Performance-Team, MediaWiki-Cache, Wikimedia-production-error

Dec 11 2019

Gilles added a comment to T239724: Fatal error: "Object does not support method calls" (from MemcachedPeclBagOStuff).

@Krinkle do you mean that every time these fatals occured, the request had an excimer sample happen?

Dec 11 2019, 8:29 PM · Core Platform Team Workboards (Architecture Review Workboard), Performance-Team, MediaWiki-Cache, Wikimedia-production-error

Dec 10 2019

Gilles added a comment to T240323: Reproduce p25 experience in US and India.

Thinking a bit more about the connectivity cap issue, it actually doesn't matter for percentiles. Because anything capped at 10 would have been higher. I had also made the mistake of looking at p75 for downlink, when I needed to look at p25 (because lower is worse for downlink, unlike the benchmark score and rtt). Here are the updated figures:

Dec 10 2019, 5:02 PM · Performance-Team
Gilles renamed T240323: Reproduce p25 experience in US and India from Determine what are the p75 phones and connectivity in the US and India to Reproduce p25 experience in US and India.
Dec 10 2019, 4:52 PM · Performance-Team
Gilles added a comment to T196558: Send X-Analytics information from Varnish to Hadoop with VCL_Log.

@ema what's the current state or plan for this in ATS?

Dec 10 2019, 2:12 PM · Operations, Traffic, Performance-Team (Radar), Analytics
Gilles renamed T196558: Send X-Analytics information from Varnish to Hadoop with VCL_Log from Evaluate alternate means to send X-Analytics information from Varnish to Hadoop. to Send X-Analytics information from Varnish to Hadoop with VCL_Log.
Dec 10 2019, 2:12 PM · Operations, Traffic, Performance-Team (Radar), Analytics
Gilles added a comment to T239724: Fatal error: "Object does not support method calls" (from MemcachedPeclBagOStuff).

Looking at the version of PHP 7 we're running, this error shows up a few times. The condition for it is always the same:

Dec 10 2019, 1:41 PM · Core Platform Team Workboards (Architecture Review Workboard), Performance-Team, MediaWiki-Cache, Wikimedia-production-error
Gilles added a comment to T240323: Reproduce p25 experience in US and India.

Ordered, second hand. I couldn't get exactly the same specs for the Motorola, the non-US version is under-clocked (same processor, though). But I don't expect that to be a problem. Next step when I receive the phones is to add or remove junk on them until I get benchmark scores that are close to the target.

Dec 10 2019, 12:05 PM · Performance-Team
Gilles added a comment to T240323: Reproduce p25 experience in US and India.

Now, microbenchmark scores.

Dec 10 2019, 11:41 AM · Performance-Team
Gilles added a comment to T240323: Reproduce p25 experience in US and India.
SELECT
event.originCountry,
PERCENTILE(event.netinfoRtt, 0.75) AS rtt_p75,
PERCENTILE(event.netinfoRtt, 0.95) AS rtt_p95,
PERCENTILE(event.netinfoRtt, 0.99) AS rtt_p99,
FLOAT(PERCENTILE(BIGINT(event.netinfoDownlink * 100), 0.75)) / 100.0 AS downlink_p75,
FLOAT(PERCENTILE(BIGINT(event.netinfoDownlink * 100), 0.95)) / 100.0 AS downlink_p95,
FLOAT(PERCENTILE(BIGINT(event.netinfoDownlink * 100), 0.99)) / 100.0 AS downlink_p99,
COUNT(*) AS sample_size
FROM event.navigationtiming
WHERE year = 2019 AND
month = 11 AND
event.originCountry IN ('IN', 'US') AND
event.netinfoRtt IS NOT NULL AND
event.netinfoDownlink IS NOT NULL AND
event.mobileMode = 'stable'
GROUP BY event.originCountry;
Dec 10 2019, 10:30 AM · Performance-Team
Gilles created T240323: Reproduce p25 experience in US and India.
Dec 10 2019, 9:29 AM · Performance-Team

Dec 9 2019

Gilles moved T239982: Investigate why the wlm_2019_de banner increased the p95 FID from 25 to 275ms from Inbox to Backlog: Future Goals on the Performance-Team board.
Dec 9 2019, 9:34 PM · Performance-Team
Gilles claimed T239982: Investigate why the wlm_2019_de banner increased the p95 FID from 25 to 275ms.
Dec 9 2019, 9:26 PM · Performance-Team
Gilles moved T240095: Downtime WebPageReplay 2019-12-07 from Inbox to Backlog: Small & Maintenance on the Performance-Team board.
Dec 9 2019, 9:24 PM · Performance-Team, WebPageReplay
Gilles moved T240201: Performance review of GrowthExperiments extension, Special:Homepage Suggested Edits module from Inbox to Doing on the Performance-Team board.
Dec 9 2019, 9:24 PM · GrowthExperiments-NewcomerTasks, Growth-Team (Current Sprint), Performance-Team
Gilles claimed T240201: Performance review of GrowthExperiments extension, Special:Homepage Suggested Edits module.
Dec 9 2019, 9:23 PM · GrowthExperiments-NewcomerTasks, Growth-Team (Current Sprint), Performance-Team
Gilles added a comment to T230813: Performance review for the MachineVision extension.

I've done the minimal sanity check of frontend payload and see that the newly introduced RL module is correctly only loaded on the special page, making this very low-risk in terms of site-wide frontend performance regression. The feature itself on the special might have possible improvements, which I'll let @Krinkle look into, but this can roll out as-is.

Dec 9 2019, 11:39 AM · Structured-Data-Backlog, Product-Infrastructure-Team-Backlog, MW-1.35-notes (1.35.0-wmf.8; 2019-11-26), Patch-For-Review, Performance-Team, MachineVision
Gilles added a comment to T238494: 15% response start regression as of 2019-11-11 (Varnish->ATS).

We're still seeing an extra 100-150ms on the p75 TTFB reported by clients in Europe compared to before 11/11. Only 20ms of which can be attributed to TLS.

Dec 9 2019, 8:38 AM · Wikimedia-Incident, Patch-For-Review, Performance-Team, Operations, Traffic

Dec 6 2019

Gilles closed T238342: www.wikipedia.org portal slow on Safari on iPhone 7 Plus with iOS 13.1.3 as Resolved.
Dec 6 2019, 4:03 PM · Mobile, Wikimedia-Portals, Performance-Team