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Peter (Peter Hedenskog)
Software Engineer, Wikimedia Foundation

Projects (6)

Today

  • Clear sailing ahead.

Tomorrow

  • Clear sailing ahead.

Saturday

  • Clear sailing ahead.

User Details

User Since
Aug 17 2015, 6:48 PM (209 w, 2 d)
Availability
Available
IRC Nick
phedenskog
LDAP User
Unknown
MediaWiki User
PHedenskog (WMF) [ Global Accounts ]

Recent Activity

Yesterday

Peter added a comment to T230901: Propose Web Performance devroom for FOSDEM 2020.

Ah great that you created the task @Gilles - let me check first thing tomorrow if I can come up with some people.

Wed, Aug 21, 3:48 PM · Performance-Team
Peter added a comment to T225416: Unify synthetic testing scripts.

Been testing it out and I think we need a change in the yargs parser to make configuration easier: https://github.com/yargs/yargs/issues/1363 - I'll have a look tomorrow and see if I can make a PR.

Wed, Aug 21, 10:49 AM · Patch-For-Review, WebPageReplay, WebPageTest, Performance-Team
Peter added a comment to T225416: Unify synthetic testing scripts.

I'll be running through setup the coming days. Yesterday I tested WebPageReplay mobile, today I'm doing desktop replay, and desktop. Then tomorrow I do the emulated mobile. After that I can verify that metrics and keys looks ok. The only thing then left to test is WebPageTest, and I guess the way to do that is to deploy another agent, so it doesn't collide with the current setup.

Wed, Aug 21, 8:16 AM · Patch-For-Review, WebPageReplay, WebPageTest, Performance-Team

Tue, Aug 20

Peter added a comment to T230708: Performance review of new foundation website design.

Just FYI before I went to sleep yesterday I added the main page to my personal test (following the same standard that we will have when we move our testing, so its just a one-liner to add a new URL):

Tue, Aug 20, 7:22 AM · Performance-Team

Mon, Aug 19

Peter added a comment to T230708: Performance review of new foundation website design.

Did a quick check and there where a couple of accessibility issues that I think should be fixed first, making it harder for screenreader etc. But I'm not sure what kind of setup we have today, if we do any automatically tests for that?

Mon, Aug 19, 6:46 PM · Performance-Team
Peter moved T225416: Unify synthetic testing scripts from This Quarter (FY1920Q1 Jul-Sep) to Doing on the Performance-Team board.
Mon, Aug 19, 6:42 PM · Patch-For-Review, WebPageReplay, WebPageTest, Performance-Team

Fri, Aug 16

Peter closed T113997: Image size different between mobile & desktop seems high (800 vs 300 kb) on Facebook as Resolved.

With the lazy loading this is solved. What's good is that Chrome 76 enabled lazy loading and seems some tweets that says Apple is also implementing it. Let me look into that. When 76 is widely used + Apple supports it we maybe could switch to use browser internal lazy loading.

Fri, Aug 16, 6:51 AM · Performance-Team

Thu, Aug 15

Peter created T230546: Chrome 77 new metrics.
Thu, Aug 15, 11:01 AM · Performance-Team, MediaWiki-extensions-NavigationTiming

Tue, Aug 13

Peter closed T230322: WebPageTest misses data since the 5th of August as Resolved.
Tue, Aug 13, 4:46 PM · Performance-Team, WebPageTest
Peter added a comment to T230322: WebPageTest misses data since the 5th of August.

I pushed this on the WebPageTest server this morning and it works now:

Tue, Aug 13, 4:46 PM · Performance-Team, WebPageTest
Peter added a comment to T230322: WebPageTest misses data since the 5th of August.

Instead of moving to the new setup (I need more time to verify that), I've just enabled the jobs in the crontab on the server. When I see that it works, I'll disable the Jenkins job and then concentrate on the long term solution.

Tue, Aug 13, 5:43 AM · Performance-Team, WebPageTest

Mon, Aug 12

Peter moved T113997: Image size different between mobile & desktop seems high (800 vs 300 kb) on Facebook from Inbox to Doing on the Performance-Team board.
Mon, Aug 12, 7:37 PM · Performance-Team
Peter moved T230322: WebPageTest misses data since the 5th of August from Inbox to Doing on the Performance-Team board.
Mon, Aug 12, 7:37 PM · Performance-Team, WebPageTest
Peter added a comment to T113997: Image size different between mobile & desktop seems high (800 vs 300 kb) on Facebook.

Let me check the numbers again and see what it looks like now. For the initial load this have changed since we lazy load on mobile.

Mon, Aug 12, 7:20 PM · Performance-Team
Peter added a comment to T230322: WebPageTest misses data since the 5th of August.

We got the alerts in Grafana (and email) that the was big diff in metrics (since we are comparing with 0).

Mon, Aug 12, 10:54 AM · Performance-Team, WebPageTest
Peter added a comment to T230322: WebPageTest misses data since the 5th of August.

The jobs in Jenkins stopped working:

Mon, Aug 12, 10:50 AM · Performance-Team, WebPageTest
Peter created T230322: WebPageTest misses data since the 5th of August.
Mon, Aug 12, 10:37 AM · Performance-Team, WebPageTest

Jul 5 2019

Peter added a comment to T225416: Unify synthetic testing scripts.

This is almost done in https://gerrit.wikimedia.org/r/#/c/performance/synthetic-monitoring-tests/+/520413/

Jul 5 2019, 11:04 AM · Patch-For-Review, WebPageReplay, WebPageTest, Performance-Team
Peter moved T192050: Use Docker version of WebPageTest agents from Doing to Backlog: Small & Maintenance on the Performance-Team board.
Jul 5 2019, 9:47 AM · Upstream, WebPageTest, Performance-Team
Peter moved T222565: Throttle the CPU for mobile testing from Doing to Backlog: Small & Maintenance on the Performance-Team board.
Jul 5 2019, 9:46 AM · WebPageReplay, Performance-Team

Jul 3 2019

Peter committed rPSMT75f16256b546: Unify all synthetic testing into one git repo. (authored by Peter).
Unify all synthetic testing into one git repo.
Jul 3 2019, 5:30 PM
Peter committed rPSMTfc076878c6e7: Unify all synthetic testing into one git repo. (authored by Peter).
Unify all synthetic testing into one git repo.
Jul 3 2019, 1:09 PM
Peter committed rPSMT92a143fdab8f: Unify all synthetic testing into one git repo. (authored by Peter).
Unify all synthetic testing into one git repo.
Jul 3 2019, 1:06 PM
Peter committed rPSMT5fc471b5163a: Unify all synthetic testing into one git repo. (authored by Peter).
Unify all synthetic testing into one git repo.
Jul 3 2019, 12:08 PM
Peter committed rPSMT64854ed58a14: Unify all synthetic testing into one git repo. (authored by Peter).
Unify all synthetic testing into one git repo.
Jul 3 2019, 11:57 AM

Jul 1 2019

Peter moved T195233: Blog post: Explain how we use Browsertime/WebPageReplay/WebPageTest from Doing to Backlog: Small & Maintenance on the Performance-Team board.
Jul 1 2019, 8:38 PM · WebPageReplay, WebPageTest, Performance-Team
Peter closed T223502: Test out different fps as Resolved.

We run 30 fps today, I think that is good enough. We can update the API later (we are still waiting on those security issues in the API :()

Jul 1 2019, 7:38 AM · WebPageTest, Performance-Team

Jun 20 2019

Peter created T226182: Alerts fired for SpeedIndex on mobile even though we should check for mwCentralNoticeBanner.
Jun 20 2019, 1:32 PM · Performance-Team, WebPageTest

Jun 18 2019

Peter added a comment to T225598: webpagetest-alerts grafana alert.

FYI: Today when we get an alert email, we look into the issue, but we haven't documented the process and how to "think", lets do that in T225987.

Jun 18 2019, 6:57 AM · Performance-Team
Peter created T225987: Create runbook on what to do when we get an alert.
Jun 18 2019, 6:56 AM · WebPageTest, WebPageReplay, Performance-Team
Peter lowered the priority of T225598: webpagetest-alerts grafana alert from High to Normal.

Hi @ayounsi I've tracked this in T225403. The reason is that when we updated to Chrome 75, we could see that it's slower for both WebPageTest and Browsertime/WebPageReplay when we run it in emulated mobile mode. So we gonna keep that task open until we have enough users on mobile that uses 75 and see if we can get the same pattern there, then we will create an upstream issue in Chrome (last week 75 wasn't released yet on Android when I tried it out).

Jun 18 2019, 6:53 AM · Performance-Team

Jun 17 2019

Peter added a comment to T218618: Consider disabling Chrome Lite pages for Wikipedia on Chrome on mobile with Cache-Control: no-transform.

In Chrome 77 it will be possible to "try" it out again: https://cs.chromium.org/chromium/src/components/previews/README

Jun 17 2019, 8:18 PM · Performance-Team (Radar), WMF-Legal, Security-Team, Privacy
Peter moved T225416: Unify synthetic testing scripts from Inbox to Doing on the Performance-Team board.
Jun 17 2019, 8:15 PM · Patch-For-Review, WebPageReplay, WebPageTest, Performance-Team
Peter moved T225598: webpagetest-alerts grafana alert from Doing to Backlog: Small & Maintenance on the Performance-Team board.
Jun 17 2019, 8:13 PM · Performance-Team
Peter claimed T225598: webpagetest-alerts grafana alert.
Jun 17 2019, 7:52 PM · Performance-Team

Jun 14 2019

Peter added a comment to T220838: Upgrade grafana to 6.x.

If we could upgrade to 6.2.x that would be great. I've been using it for my projects for a while and the lazy loading of panels out of view really makes large dashboards working better (and faster). We have a couple of dashboards in the performance team that are really slow.

Jun 14 2019, 5:10 AM · observability, Operations

Jun 13 2019

Peter added a comment to T225403: Investigate increase in First Visual Change mobile enwiki.

Yep got a small change on Browsertime/WebPageReplay too (one tick):

Jun 13 2019, 1:18 PM · Performance-Team
Peter updated the task description for T214026: Create a list of what's needed for getting the mobile phone performance lab running.
Jun 13 2019, 12:35 PM · Performance-Team
Peter reopened T214026: Create a list of what's needed for getting the mobile phone performance lab running, a subtask of T197847: Collect performance metrics from a mobile over time, as Open.
Jun 13 2019, 12:33 PM · Performance-Team
Peter reopened T214026: Create a list of what's needed for getting the mobile phone performance lab running as "Open".

Re-open since we later this year probably can support iOS devices!

Jun 13 2019, 12:33 PM · Performance-Team
Peter added a comment to T220751: [Bug] Extreme latency due to JavaScript parsing on DOM-heavy pages.

One last thing: It's good to turn on screenshots, that makes easier to understand what happens (--chrome.enableTraceScreenshots). Also I tried to add annotations to the timeline console.timeStamp("Test"); but I cannot get them to be visible in the gui (I see them in the trace log though).

Jun 13 2019, 12:01 PM · Performance-Team (Radar), Readers-Web-Backlog, MW-1.34-notes (1.34.0-wmf.1; 2019-04-16)
Peter reassigned T220751: [Bug] Extreme latency due to JavaScript parsing on DOM-heavy pages from Peter to nray.

Signing over to you Nick to answer the questions.

Jun 13 2019, 9:41 AM · Performance-Team (Radar), Readers-Web-Backlog, MW-1.34-notes (1.34.0-wmf.1; 2019-04-16)
Peter added a comment to T220751: [Bug] Extreme latency due to JavaScript parsing on DOM-heavy pages.

At least in theory you can tell the webdriver that you wanna have the control back asap the navigation has started (pageLoadStrategy on the webdriver world).

Jun 13 2019, 9:40 AM · Performance-Team (Radar), Readers-Web-Backlog, MW-1.34-notes (1.34.0-wmf.1; 2019-04-16)
Peter added a comment to T220751: [Bug] Extreme latency due to JavaScript parsing on DOM-heavy pages.

I've had a go today to first try to automate it, so we can find these kind of things in the future when we have a performance device lab. First @nray for the original, that has been solved right?

Jun 13 2019, 8:46 AM · Performance-Team (Radar), Readers-Web-Backlog, MW-1.34-notes (1.34.0-wmf.1; 2019-04-16)

Jun 12 2019

Peter claimed T220751: [Bug] Extreme latency due to JavaScript parsing on DOM-heavy pages.

Oh @nray sorry I missed this, let me have a look first thing tomorrow.

Jun 12 2019, 6:37 PM · Performance-Team (Radar), Readers-Web-Backlog, MW-1.34-notes (1.34.0-wmf.1; 2019-04-16)
Peter added a comment to T225403: Investigate increase in First Visual Change mobile enwiki.

I've pushed Chrome 75 now, let it run for the day and have another look.

Jun 12 2019, 4:12 AM · Performance-Team

Jun 10 2019

Peter created T225416: Unify synthetic testing scripts.
Jun 10 2019, 11:02 AM · Patch-For-Review, WebPageReplay, WebPageTest, Performance-Team
Peter added a comment to T225403: Investigate increase in First Visual Change mobile enwiki.

No change in WebPageReplay and I could see that it happened in the same time of Chrome 75 for WebPageTest. On Wednesday I'll roll out 75 for WebPageReplay and I can create an upstream task if we get it there too.

Jun 10 2019, 10:45 AM · Performance-Team
Peter created T225403: Investigate increase in First Visual Change mobile enwiki.
Jun 10 2019, 8:10 AM · Performance-Team

Jun 6 2019

Peter closed T211487: Create on-wiki baseline page for our synthetic tests as Resolved.

Running both for WPT and WPR

Jun 6 2019, 11:31 AM · WebPageTest, Performance-Team
Peter closed T203082: One dashboard to rule them all (to identify performance regressions) as Declined.

This is probably not practical: When we will create alerts for all Wikis we will do that on one dashboard per Wiki. Having everything (or something smart) on one dashboard is probably too complicated.

Jun 6 2019, 11:28 AM · Performance-Team
Peter closed T217534: Create runbook for WebPageReplay as Resolved.

https://wikitech.wikimedia.org/wiki/Performance/Runbook/WebPageReplay

Jun 6 2019, 10:33 AM · Performance-Team, WebPageReplay
Peter closed T215489: [Investigate] Measure time spent as a logged in user from different locations as Resolved.

Done in: https://wikitech.wikimedia.org/wiki/Performance/Synthetic_Measurement_Experiment_2019

Jun 6 2019, 10:33 AM · Performance-Team
Peter closed T214026: Create a list of what's needed for getting the mobile phone performance lab running, a subtask of T197847: Collect performance metrics from a mobile over time, as Resolved.
Jun 6 2019, 10:30 AM · Performance-Team
Peter closed T214026: Create a list of what's needed for getting the mobile phone performance lab running as Resolved.

The list is done.

Jun 6 2019, 10:30 AM · Performance-Team
Peter moved T211381: Detect performance changes on deploy more quickly from Backlog: Small & Maintenance to Backlog: Future Goals on the Performance-Team board.
Jun 6 2019, 10:27 AM · Performance-Team
Peter closed T207440: Chrome 69 -> Chrome 70 changes in metrics as Resolved.

This is one of the ones that we blogged about and Chrome acknowledged.

Jun 6 2019, 10:20 AM · WebPageTest, WebPageReplay, Performance-Team
Peter added a comment to T210046: Integrate https://chromedevtools.github.io/timeline-viewer/ to our trace logs.

Yes it is fixed ... but I tested it yesterday and the timeline viewer doesn't support the new timings (fixed that yesterday). So I'm thinking as a long term solution we should remove what I did and ask people to use their local version of Chrome.

Jun 6 2019, 10:11 AM · WebPageReplay, Performance-Team
Peter closed T203543: Chrome 69 increase time for first visual change in synthetic testing as Resolved.

We blogged about and get some feedback from the Chrome team that we found something.

Jun 6 2019, 10:09 AM · WebPageReplay, Upstream, Performance-Team
Peter moved T188204: Test and create a WPT Agent on Cloud VPS from Backlog: Small & Maintenance to Backlog: Future Goals on the Performance-Team board.
Jun 6 2019, 10:07 AM · WebPageTest, Performance-Team
Peter moved T203060: Evaluate deploying synthetic testing on bare metal from Backlog: Small & Maintenance to Backlog: Future Goals on the Performance-Team board.
Jun 6 2019, 10:07 AM · Performance-Team
Peter closed T194807: Try out first input delay as Resolved.

Yes we do says @Gilles so closing

Jun 6 2019, 10:05 AM · Performance-Team
Peter added a comment to T205601: Clean up start script for WebPageReplay.

When we move to the new setup this will be automatically fixed and will be in Git.

Jun 6 2019, 10:03 AM · WebPageReplay, Performance-Team
Peter closed T204345: Wrong images are picked up in Browsertime/WebPageReplay on Mobile as Resolved.

This is fixed now

Jun 6 2019, 10:02 AM · Performance-Team, WebPageReplay
Peter closed T196312: Fine tune WebPageTest alerts as Resolved.

This works better now when we moved to 30 fps for the video.

Jun 6 2019, 9:58 AM · WebPageTest, Performance-Team
Peter closed T196312: Fine tune WebPageTest alerts, a subtask of T196242: Chrome 67 performance regression, as Resolved.
Jun 6 2019, 9:58 AM · Performance-Team (Radar), Upstream
Peter closed T192536: High variance in Chrome for one of the URLs on the Japanese Wikipedia as Declined.

T190020 can make it easier to get better metrics.

Jun 6 2019, 9:55 AM · Performance-Team, WebPageTest
Peter added projects to T190020: Different strokes for different URLs: WebPageReplay, WebPageTest.
Jun 6 2019, 9:52 AM · WebPageTest, WebPageReplay, Performance-Team
Peter added a comment to T185741: Alert on log errors on Browsertime/WebPageReplay.

Let us fix that when we have the new setup.

Jun 6 2019, 9:45 AM · Performance-Team
Peter added a comment to T164714: Calculate parsing speed for JavaScript on mobile.

We will automatically have this when we have the mobile device lab.

Jun 6 2019, 9:43 AM · Mobile, Performance-Team
Peter added a parent task for T164714: Calculate parsing speed for JavaScript on mobile: T136850: Test performance on real mobile devices.
Jun 6 2019, 9:42 AM · Mobile, Performance-Team
Peter added a subtask for T136850: Test performance on real mobile devices: T164714: Calculate parsing speed for JavaScript on mobile.
Jun 6 2019, 9:42 AM · Performance-Team, Epic
Peter added a comment to T153301: Make it easy to compare WebPageTest results on alerts.

I think we should do this differently: On alerts we should pre-populate a link with runs before/after a alert, so you as a user just have a link to click on that automatically fills in the right values into the compare page.

Jun 6 2019, 9:41 AM · Upstream, WebPageTest, Performance-Team
Peter renamed T153301: Make it easy to compare WebPageTest results on alerts from Make it easier compare WebPageTest results to Make it easy to compare WebPageTest results on alerts.
Jun 6 2019, 9:40 AM · Upstream, WebPageTest, Performance-Team
Peter added a comment to T159668: WebPageTest private server loads assets from Google.

Yeah I've modified our instance but that's is no long term solution. Some time ago I added it back, so we more easily can keep our server update.

Jun 6 2019, 8:59 AM · Performance-Team, Upstream, WebPageTest
Peter added a comment to T175708: Add annotations per URL tested in WebPageTest.

Moving to the new setup after the summer we will automatically have it.

Jun 6 2019, 8:57 AM · WebPageReplay, Performance-Team, WebPageTest
Peter added a comment to T118133: Devise a proper configuration file format for WebPageTest jobs.

When we move this to the new setup all configuration will be in JSON and will be much easier than the current setup.

Jun 6 2019, 8:50 AM · WebPageTest, Performance-Team

Jun 3 2019

Peter created T224896: Deploy and test WebPageTest agent in Cape Town (early 2020).
Jun 3 2019, 3:22 PM · Performance-Team, WebPageTest

May 28 2019

Peter added a comment to T214027: Collect mobile phone statistics and send them to Graphite.

The simplest way to get the temperature is:

adb -s ZY3222N2CZ shell dumpsys battery | grep temperature | grep -Eo '[0-9]{1,3}'
May 28 2019, 5:16 AM · Performance-Team

May 27 2019

Peter created T224427: Compare performance against Alexa top 10.
May 27 2019, 1:43 PM · Performance-Team

May 23 2019

Peter added a comment to T223502: Test out different fps .

I've changed so default is 30 instead of null as a hack. If it works good I'll make a PR for the API.

May 23 2019, 4:53 AM · WebPageTest, Performance-Team

May 21 2019

Peter added a comment to T223502: Test out different fps .

I looked into the code and there is a hidden query fps parameter that you can use. There's two ways to do that:

  1. Add support to the WPT API (I can do a PR for that)
  2. Hack and set it to 30 fps per default (the same way we hacked setting Visual Elements on all runs.
May 21 2019, 7:39 AM · WebPageTest, Performance-Team

May 20 2019

Peter moved T223101: Measure most common use case for users from Doing to Backlog: Small & Maintenance on the Performance-Team board.
May 20 2019, 8:02 PM · WebPageTest, Performance-Team
Peter moved T223502: Test out different fps from Inbox to Doing on the Performance-Team board.
May 20 2019, 8:01 PM · WebPageTest, Performance-Team
Peter added a comment to T218618: Consider disabling Chrome Lite pages for Wikipedia on Chrome on mobile with Cache-Control: no-transform.

We got feedback in the upstream issue that there's no way to test today but they will add a flag: https://bugs.chromium.org/p/chromium/issues/detail?id=956685#c13

May 20 2019, 7:28 AM · Performance-Team (Radar), WMF-Legal, Security-Team, Privacy

May 17 2019

Peter added a comment to T223502: Test out different fps .

Looks like you only can set the fps for the video per agent (when you start the agent): https://github.com/WPO-Foundation/wptagent/blob/829a9f8111ae8bcf52c99ff574bcec3c924ebd9e/README.md#video-capturedisplay-settings

May 17 2019, 5:30 AM · WebPageTest, Performance-Team
Peter created T223502: Test out different fps .
May 17 2019, 5:05 AM · WebPageTest, Performance-Team

May 13 2019

Peter closed T184681: Document how to run performance tests on real phones as Resolved.

I think we can close it and the next time someone tries it out and it doesn't work, let us update the docs!

May 13 2019, 8:17 PM · Readers-Web-Backlog (Tracking), Mobile, Documentation, Performance-Team
Peter closed T184681: Document how to run performance tests on real phones, a subtask of T184527: Test performance win with lazy references on a real mobile phone, as Resolved.
May 13 2019, 8:17 PM · Performance-Team
Peter closed T207251: Test out different trace settings for Chrome as Resolved.

I've updated Browsertime to use Tracium and a setup that catch more log events, that will work perfect for us. It will work the next time we update.

May 13 2019, 8:16 PM · Browser-Support-Google-Chrome, WebPageReplay, Performance-Team
Peter moved T223101: Measure most common use case for users from Inbox to Doing on the Performance-Team board.
May 13 2019, 7:44 PM · WebPageTest, Performance-Team
Peter moved T223103: Make it easy for developers to add new URLs to continously test from Inbox to Backlog: Future Goals on the Performance-Team board.
May 13 2019, 7:44 PM · WebPageTest, WebPageReplay, Performance-Team
Peter renamed T223103: Make it easy for developers to add new URLs to continously test from Make it easy for developers to add new URLs to test to Make it easy for developers to add new URLs to continously test.
May 13 2019, 6:52 PM · WebPageTest, WebPageReplay, Performance-Team
Peter added projects to T223103: Make it easy for developers to add new URLs to continously test: WebPageReplay, WebPageTest.
May 13 2019, 1:45 PM · WebPageTest, WebPageReplay, Performance-Team
Peter created T223103: Make it easy for developers to add new URLs to continously test.
May 13 2019, 1:44 PM · WebPageTest, WebPageReplay, Performance-Team
Peter created T223101: Measure most common use case for users.
May 13 2019, 1:33 PM · WebPageTest, Performance-Team

May 6 2019

Peter created T222565: Throttle the CPU for mobile testing.
May 6 2019, 5:24 AM · WebPageReplay, Performance-Team

Apr 29 2019

Peter moved T205722: Prepare materials for internal synthetic testing presentation from Doing to Backlog: Small & Maintenance on the Performance-Team board.
Apr 29 2019, 8:31 PM · Performance-Team
Peter added a comment to T220751: [Bug] Extreme latency due to JavaScript parsing on DOM-heavy pages.

Hi @nray can we do this in two steps? Since we missed it, I think we should try out first to instrument it. We could use https://developer.mozilla.org/en-US/docs/Web/API/User_Timing_API (we already use that for the startup module)? If we can make sure that we measure it, and push it first, then we get some data from real users, before you push the fix. That way we can make sure it is a real issue today, fix it and enjoy the win of the fix and maybe blog about it :)

Apr 29 2019, 12:57 PM · Performance-Team (Radar), Readers-Web-Backlog, MW-1.34-notes (1.34.0-wmf.1; 2019-04-16)

Apr 26 2019

Peter added a project to T220751: [Bug] Extreme latency due to JavaScript parsing on DOM-heavy pages: Performance-Team.
Apr 26 2019, 12:04 PM · Performance-Team (Radar), Readers-Web-Backlog, MW-1.34-notes (1.34.0-wmf.1; 2019-04-16)