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Peter (Peter Hedenskog)
Software Engineer, Wikimedia Foundation

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User Details

User Since
Aug 17 2015, 6:48 PM (236 w, 2 d)
Availability
Available
IRC Nick
phedenskog
LDAP User
Unknown
MediaWiki User
PHedenskog (WMF) [ Global Accounts ]

Recent Activity

Today

Peter created T246315: Search icon outside of screen on small devices on Kai OS.
Thu, Feb 27, 7:38 AM · Readers-Web-Backlog, MobileFrontend

Fri, Feb 21

Peter added a comment to T240978: Performance review of Wikipedia KaiOS app.

Ok, there a couple of things I want to start with:

  • Since this will run on many different low end devices, I think we should instrument/collect metrics from real users so that we can find potential problems in the future. There's an API called the User Timing AP I that we can use to internally measure our code, its been around since Firefox 30 something so it should work. From the outside I would measure API calls, parse times of content etc. But you that knows the app better maybe have other input. Thinking we could integrate it with https://github.com/wikimedia/wikipedia-kaios/pull/131.
  • Its important that you feel that everything is ready when we start to test, do you know when you are? :)
  • Since there's no good way to automate performance testing on Kai OS devices (at least that I've found) I think the easiest way it just to compare, so I think we should compare the current mobile version for example https://en.m.wikipedia.org/wiki/Barack_Obama with the Kai OS version, coming from search, direct hit etc. Sounds ok?
Fri, Feb 21, 9:29 AM · KaiOS-Wikipedia-app, Inuka-Team, Performance-Team

Thu, Feb 20

Peter added a comment to T240978: Performance review of Wikipedia KaiOS app.

Great lets do it @hueitan ! I'll work on a short list of things that I will add on the task tomorrow, so you have some time to read through.

Thu, Feb 20, 2:01 PM · KaiOS-Wikipedia-app, Inuka-Team, Performance-Team

Wed, Feb 19

Peter added a comment to T240978: Performance review of Wikipedia KaiOS app.

@AMuigai I can start doing the performance review (we in the performance team discussed it in our weekly meeting). I think the best way to do it is if we do it together with one of you, then I can share how and what I test, and you can share how it's built so I don't focus on wrong thing. Then I will learn more about the app and one of you learn more about performance? :)

Wed, Feb 19, 8:36 AM · KaiOS-Wikipedia-app, Inuka-Team, Performance-Team

Tue, Feb 18

Peter moved T244957: False alerts for WebPageReplay from Inbox to Doing on the Performance-Team board.
Tue, Feb 18, 9:45 PM · Performance-Team, WebPageReplay
Peter added a comment to T240978: Performance review of Wikipedia KaiOS app.

Hi @AMuigai I want to check if its ready for testing?

Tue, Feb 18, 12:30 PM · KaiOS-Wikipedia-app, Inuka-Team, Performance-Team
Peter closed T210125: Add documentation for how to instrument frontend measurements as Resolved.

Added https://wikitech.wikimedia.org/wiki/Performance/Add_metrics lets skip console.timeStamp.

Tue, Feb 18, 11:54 AM · Performance-Team

Mon, Feb 17

Peter closed T233417: Deploy a version of navtiming or coal as Resolved.

Did it with help from @dpifke

Mon, Feb 17, 2:22 PM · Performance-Team
Peter added a comment to T244957: False alerts for WebPageReplay.

I've been running the new setup for some days and I got one false alert. Checkout the graphs:

Mon, Feb 17, 2:11 PM · Performance-Team, WebPageReplay

Fri, Feb 14

Peter added a comment to T244957: False alerts for WebPageReplay.

I've been trying a new approach the last couple of days on another machine and I think it looks ok now. Instead of taking averages or median over X hours for the graph, I added so we keep the last value. That way will immediately get an alert when the metrics go up.

Fri, Feb 14, 7:35 AM · Performance-Team, WebPageReplay

Wed, Feb 12

Peter added a comment to T244957: False alerts for WebPageReplay.

We have had downtime on the tests

Wed, Feb 12, 7:48 AM · Performance-Team, WebPageReplay
Peter created T244957: False alerts for WebPageReplay.
Wed, Feb 12, 7:33 AM · Performance-Team, WebPageReplay

Mon, Feb 10

Peter moved T210911: Request on mobile isn't recorded in the replay proxy from Doing to Backlog: Small & Maintenance on the Performance-Team board.
Mon, Feb 10, 9:31 PM · WebPageReplay, Performance-Team
Peter moved T244733: Write blog post about our developer room at FOSDEM from Inbox to Doing on the Performance-Team board.
Mon, Feb 10, 9:05 PM · Performance-Team
Peter created T244733: Write blog post about our developer room at FOSDEM.
Mon, Feb 10, 12:52 PM · Performance-Team
Peter reopened T243339: Unstable backend time for WebPageReplay as "Open".

This is an issue on emulated mobile:


Mon, Feb 10, 8:49 AM · WebPageReplay, Performance-Team

Fri, Feb 7

Peter closed T238051: Update WebPageTest documentation as Resolved.

I've added the new runner machine and added an example on how to add new URLs to test.

Fri, Feb 7, 12:12 PM · Documentation, WebPageTest, Performance-Team
Peter closed T238087: Add documentation for user journeys as Resolved.

Added https://wikitech.wikimedia.org/wiki/Performance/User_Journey

Fri, Feb 7, 11:24 AM · Documentation, Performance-Team
Peter closed T240089: WebPageTest tests stopped running as Resolved.

I verified that we have an alert on AWS, it looks ok. Let hope it works the next time :|

Fri, Feb 7, 11:22 AM · WebPageTest, Performance-Team

Wed, Feb 5

Peter closed T244202: WebPageTest alerts 2020-02-04 as Resolved.

Fixed upstream.

Wed, Feb 5, 11:27 AM · Upstream, WebPageTest, Performance-Team

Tue, Feb 4

Peter added a project to T244202: WebPageTest alerts 2020-02-04: Upstream.

This has been fixed upstream, I can see tests going through but let me verify that the queue if fully finished before I close the issue.

Tue, Feb 4, 1:17 PM · Upstream, WebPageTest, Performance-Team
Peter added a comment to T244202: WebPageTest alerts 2020-02-04.

Added an upstream comment: https://github.com/WPO-Foundation/wptagent/commit/b05a61f947700f1bd346a66c33596402af6babe1#commitcomment-37106192

Tue, Feb 4, 9:15 AM · Upstream, WebPageTest, Performance-Team
Peter added a comment to T244202: WebPageTest alerts 2020-02-04.

Restarting the agent doesn't work, it seems it stuck. I tried to stop and it took a long time. I started again, followed https://github.com/WPO-Foundation/webpagetest/issues/929 but there are still all the jobs in the queue.

Tue, Feb 4, 8:39 AM · Upstream, WebPageTest, Performance-Team
Peter added a comment to T244202: WebPageTest alerts 2020-02-04.

I've restarted the agent and removed all tests in the queue and I'm waiting so see if it helped.

Tue, Feb 4, 8:07 AM · Upstream, WebPageTest, Performance-Team
Peter created T244202: WebPageTest alerts 2020-02-04.
Tue, Feb 4, 7:59 AM · Upstream, WebPageTest, Performance-Team

Mon, Feb 3

Peter added a comment to T243878: Collect Element Timings in WebPageTest.

Also check if we can add it directly to WPT or if it is an upstream task for that.

Mon, Feb 3, 9:13 PM · WebPageTest, Performance-Team
Peter moved T243878: Collect Element Timings in WebPageTest from Inbox to Backlog: Small & Maintenance on the Performance-Team board.
Mon, Feb 3, 9:12 PM · WebPageTest, Performance-Team
Peter moved T243385: Orange frame picked up for Chrome as first visual change from Inbox to Radar on the Performance-Team board.
Mon, Feb 3, 7:54 PM · Performance-Team (Radar), Upstream, WebPageReplay

Wed, Jan 29

Peter created T243878: Collect Element Timings in WebPageTest.
Wed, Jan 29, 8:45 AM · WebPageTest, Performance-Team

Tue, Jan 28

Peter closed T223103: Make it easy for developers to add new URLs to continously test as Resolved.

This was done as part of T219496

Tue, Jan 28, 12:11 PM · WebPageTest, WebPageReplay, Performance-Team
Peter closed T223103: Make it easy for developers to add new URLs to continously test, a subtask of T219496: [Meta] Next level of synthetic testing, as Resolved.
Tue, Jan 28, 12:11 PM · Performance-Team
Peter closed T211618: New alert strategy: One URL can fire first visual change as Declined.
Tue, Jan 28, 12:07 PM · WebPageReplay, Performance-Team
Peter added a comment to T211618: New alert strategy: One URL can fire first visual change .

With the new problem of Chrome 79 T240723 I think we should avoid it. We can rethink this when we run on new machines in the future.

Tue, Jan 28, 12:07 PM · WebPageReplay, Performance-Team
Peter closed T210046: Integrate https://chromedevtools.github.io/timeline-viewer/ to our trace logs as Declined.

Moving to the new setup we don't need this. Firefox have their own online and Chrome works fine in the browser (Firefox soon too).

Tue, Jan 28, 12:06 PM · WebPageReplay, Performance-Team
Peter closed T190020: Different strokes for different URLs as Resolved.

We kind of have implemented this by having more runs testing enwiki and lower runs testing others.

Tue, Jan 28, 12:05 PM · WebPageTest, WebPageReplay, Performance-Team

Jan 28 2020

Peter closed T242605: Fix errors in the logs for WebPageReplay as Resolved.

I went through the logs on the three servers and only error now is from edit a page (that doesn't work because the server is blocked) and when testing other web sites that we soon should use to compare against others.

Jan 28 2020, 7:42 AM · Performance-Team, WebPageReplay
Peter closed T243293: Different configurations when replaying for different browsers as Resolved.

I've made a hack in to fix this now, in the future we could do one base configuration file that we extends ones for Firefox and one for Chrome. Let us do that when we need it the next time.

Jan 28 2020, 7:33 AM · WebPageReplay, Performance-Team
Peter closed T242578: Testing multiple pages sometimes timeouts and pages aren't tested as Resolved.

This was fixed when upgrading to Chrome 80. See https://bugs.chromium.org/p/chromium/issues/detail?id=1035305#c20 and https://bugs.chromium.org/p/chromium/issues/detail?id=1041421. There where some things going on in Chrome that made the browser freeze.

Jan 28 2020, 7:31 AM · Performance-Team (Radar), Upstream, WebPageReplay

Jan 27 2020

Peter closed T243745: Overhead using new Geckoprofiler for Firefox as Resolved.
Jan 27 2020, 7:03 PM · Performance-Team, WebPageReplay
Peter added a comment to T243745: Overhead using new Geckoprofiler for Firefox.

Since I turned it off there's nothing more to do here for us, let me check with Mozilla if they have any recommendations.

Jan 27 2020, 7:03 PM · Performance-Team, WebPageReplay
Peter added a comment to T243745: Overhead using new Geckoprofiler for Firefox.

I removed using gecko profiler. First view:

Jan 27 2020, 6:37 PM · Performance-Team, WebPageReplay
Peter added a comment to T243745: Overhead using new Geckoprofiler for Firefox.

We also test that page standalone and it looks like this:

Jan 27 2020, 10:03 AM · Performance-Team, WebPageReplay
Peter created T243745: Overhead using new Geckoprofiler for Firefox.
Jan 27 2020, 9:54 AM · Performance-Team, WebPageReplay
Peter closed T243339: Unstable backend time for WebPageReplay as Resolved.

Upgrading fixed the issue so will upgrade to the rest of the servers too.

Jan 27 2020, 6:54 AM · WebPageReplay, Performance-Team

Jan 23 2020

Peter added a comment to T210911: Request on mobile isn't recorded in the replay proxy.

My guess is that we somehow uses different configs when we record and replay for the browser. But I haven't been able to nail down the problem + it seems an old issue is back. A couple of years ago emulated mode started to resize the screen size in Chrome just before the load ended (I'll need to find that issue) and when I tried now with different device emulations, I could see that again :(

Jan 23 2020, 10:17 PM · WebPageReplay, Performance-Team
Peter added a comment to T243339: Unstable backend time for WebPageReplay.

This looks like it was fixed by upgrading but I wanna run it over the weekend to be 100% and then we can upgrade the rest of the servers. I also need to dig into the changelog and understand WHY it works now.

Jan 23 2020, 8:44 PM · WebPageReplay, Performance-Team
Peter added a comment to T210911: Request on mobile isn't recorded in the replay proxy.

I think the problem is images served as image/webp - yep, I'm pretty sure that's the problem.

Jan 23 2020, 8:41 PM · WebPageReplay, Performance-Team
Peter added a comment to T210911: Request on mobile isn't recorded in the replay proxy.

I've been trying to fix this again. I can see that we record 24 requests for the Facebook page on mobile but replay 26. So something is wrong.

Jan 23 2020, 6:15 PM · WebPageReplay, Performance-Team
Peter moved T210911: Request on mobile isn't recorded in the replay proxy from Backlog: Small & Maintenance to Doing on the Performance-Team board.
Jan 23 2020, 6:14 PM · WebPageReplay, Performance-Team
Peter closed T205601: Clean up start script for WebPageReplay as Resolved.

We moved this to git and the new setup so it is fixed.

Jan 23 2020, 6:14 PM · WebPageReplay, Performance-Team
Peter closed T175708: Add annotations per URL tested in WebPageTest as Resolved.

This was fixed when we rolled up the new setup before Christmas.

Jan 23 2020, 6:13 PM · WebPageReplay, Performance-Team, WebPageTest
Peter moved T238051: Update WebPageTest documentation from Next In This Quarter / Jan-Mar 2020 to Doing on the Performance-Team board.
Jan 23 2020, 6:11 PM · Documentation, WebPageTest, Performance-Team
Peter closed T235595: Test running Firefox performance tests on Android as Resolved.

Yep it works now. It needed some new code from Mozilla.

Jan 23 2020, 6:10 PM · Performance-Team
Peter added a comment to T234103: Try performance tune one of the AWS instances.

It would be super useful to get your eyes on this @dpifke ! First like a sanity check to see what it looks like now and then we could setup a new instance that you can play around with. We could just setup the tests we run for enwiki and send the metrics to another graphite namespace.

Jan 23 2020, 1:32 PM · WebPageReplay, Performance-Team
Peter reassigned T239472: Instrument number of processes running on the WebPageReplay servers from Peter to dpifke.

I think this should be a part of bigger thing where we collect more metrics for our synthetic testing machines. @dpifke is that something you would like to do?

Jan 23 2020, 1:31 PM · observability, WebPageReplay, Performance-Team
Peter added a comment to T237359: Smarter AWS alerts.

There's a couple of things we could check to know if it works: Is the Docker container up and running? How long time has it been running? It has happened in the past that a container is stuck, but we spin up a new one for every test, so if a container run over X minutes, we know something is wrong.

Jan 23 2020, 1:27 PM · WebPageTest, WebPageReplay, Performance-Team
Peter added a comment to T243339: Unstable backend time for WebPageReplay.

I'm doing a test for the enwiki tests and upgrade to the latest container.

Jan 23 2020, 1:08 PM · WebPageReplay, Performance-Team

Jan 22 2020

Peter added a comment to T243339: Unstable backend time for WebPageReplay.

I had a look at my now instance and could see the same pattern there:

Jan 22 2020, 4:59 PM · WebPageReplay, Performance-Team
Peter added a comment to T243339: Unstable backend time for WebPageReplay.

This only happens when we test desktop. Here we are looking at the max value for backendtime ("should" be stable). This is Barack Obama using replay desktop:

Jan 22 2020, 4:25 PM · WebPageReplay, Performance-Team
Peter added a comment to T243385: Orange frame picked up for Chrome as first visual change.

It looks like this:

Jan 22 2020, 11:31 AM · Performance-Team (Radar), Upstream, WebPageReplay
Peter created T243385: Orange frame picked up for Chrome as first visual change.
Jan 22 2020, 11:30 AM · Performance-Team (Radar), Upstream, WebPageReplay
Peter added a comment to T243339: Unstable backend time for WebPageReplay.

It seems to only happen for Chrome. I wonder if there's something with the certificate? I tried last week the net log from Chrome but no luck but I can try again. With the current setup there's not any more info we can get from the browser.

Jan 22 2020, 9:59 AM · WebPageReplay, Performance-Team

Jan 21 2020

Peter added a comment to T243339: Unstable backend time for WebPageReplay.

From the trace log:

Jan 21 2020, 9:30 PM · WebPageReplay, Performance-Team
Peter added a comment to T243339: Unstable backend time for WebPageReplay.

It seems it is categorized as SSL time:


Jan 21 2020, 9:27 PM · WebPageReplay, Performance-Team
Peter moved T243173: Add job to remove old annotations in Graphite from Inbox to Backlog: Small & Maintenance on the Performance-Team board.
Jan 21 2020, 9:21 PM · Performance-Team
Peter moved T243293: Different configurations when replaying for different browsers from Inbox to Backlog: Small & Maintenance on the Performance-Team board.
Jan 21 2020, 9:20 PM · WebPageReplay, Performance-Team
Peter moved T243339: Unstable backend time for WebPageReplay from Inbox to Doing on the Performance-Team board.
Jan 21 2020, 9:19 PM · WebPageReplay, Performance-Team
Peter created T243339: Unstable backend time for WebPageReplay.
Jan 21 2020, 9:08 PM · WebPageReplay, Performance-Team
Peter created T243293: Different configurations when replaying for different browsers.
Jan 21 2020, 3:31 PM · WebPageReplay, Performance-Team
Peter closed T243068: Add alert for total page size as Resolved.
Jan 21 2020, 2:48 PM · WebPageReplay, WebPageTest, Performance-Team
Peter added a comment to T243068: Add alert for total page size.

I added alerts for 200 kb. So if all three pages (on mobile or desktop) increases with 200 kb we will fire an alert. Let us try that limit for a while.

Jan 21 2020, 2:48 PM · WebPageReplay, WebPageTest, Performance-Team
Peter added a comment to T243068: Add alert for total page size.

I've prepared everything but haven't added the actual alert:
https://grafana.wikimedia.org/d/2kP3FjAZk/webpagereplay-en-wikipedia-org-alerts?orgId=1

Jan 21 2020, 1:55 PM · WebPageReplay, WebPageTest, Performance-Team
Peter added a comment to T240723: Chrome 79 First Visual Change regression.

I think you can see when I did the switch to 80:

Jan 21 2020, 1:23 PM · Upstream, Performance-Team, WebPageReplay, WebPageTest

Jan 20 2020

Peter closed T240557: Investigate increase in First Visual Change and Speed Index for Firefox as Resolved.

This was reported upstream and they could reproduce. Only happens on Linux. However in the next release 72 the performance increased. There's nothing more that we can do about it.

Jan 20 2020, 11:43 AM · Upstream, WebPageTest, Performance-Team, WebPageReplay
Peter added a comment to T242578: Testing multiple pages sometimes timeouts and pages aren't tested.

Got some updates: The Chromedriver team says it's in Chrome and cannot get any more information in the driver. I'll keep track of it and see if we can see anything from the trace log from Chrome when it happens.

Jan 20 2020, 11:42 AM · Performance-Team (Radar), Upstream, WebPageReplay
Peter closed T242903: Test Chrome 80 as Resolved.

We got 80 up and running but no change. I'll keep it there until someone on the Chrome team has time to comment on the issue.

Jan 20 2020, 11:39 AM · Performance-Team, WebPageReplay
Peter closed T242903: Test Chrome 80, a subtask of T240723: Chrome 79 First Visual Change regression, as Resolved.
Jan 20 2020, 11:39 AM · Upstream, Performance-Team, WebPageReplay, WebPageTest
Peter renamed T243173: Add job to remove old annotations in Graphite from Add weekly job to remove old annotations in Graphite to Add job to remove old annotations in Graphite.
Jan 20 2020, 11:38 AM · Performance-Team
Peter added a comment to T222163: [EPIC] Monitor complex pages rendering time on mobile web.

We have some CPU time spent for the URLs we test today (like spent parsing HTML, style etc), checkout https://grafana.wikimedia.org/d/000000059/webpagereplay-drilldown?orgId=1&var-base=sitespeed_io&var-path=emulatedMobileReplay&var-group=en_m_wikipedia_org&var-page=_wiki_Barack_Obama&var-browser=chrome&var-connectivity=100&var-function=median and scroll down to the CPU section. That is collected on a AWS server, where we slowdown the CPU to try to look more like what it is on a mobile phone. It's not perfect but will work until we can use real phones.

Jan 20 2020, 10:34 AM · Readers-Web-Backlog, MobileFrontend
Peter created T243173: Add job to remove old annotations in Graphite.
Jan 20 2020, 10:06 AM · Performance-Team

Jan 17 2020

Peter added a comment to T243062: Investigate major increase in total page size.

Great thanks @Pcoombe !

Jan 17 2020, 1:49 PM · Performance Issue, Wikimedia-CentralNotice-Administration, Performance-Team
Peter created T243068: Add alert for total page size.
Jan 17 2020, 11:34 AM · WebPageReplay, WebPageTest, Performance-Team
Peter updated the task description for T243062: Investigate major increase in total page size.
Jan 17 2020, 11:15 AM · Performance Issue, Wikimedia-CentralNotice-Administration, Performance-Team
Peter added a comment to T243062: Investigate major increase in total page size.

It's the same on mobile:

Jan 17 2020, 11:14 AM · Performance Issue, Wikimedia-CentralNotice-Administration, Performance-Team
Peter added a comment to T243062: Investigate major increase in total page size.

Attaching an optimized jpg (74% quality) 30 kb

and a one (81% quality) at 35 kb
- I use https://imageoptim.com to compress them.

Jan 17 2020, 10:54 AM · Performance Issue, Wikimedia-CentralNotice-Administration, Performance-Team
Peter added a comment to T243062: Investigate major increase in total page size.

The problem image is https://upload.wikimedia.org/wikipedia/donate/a/a7/WLE_banner_2010.png - 863 kb no cache time.

Jan 17 2020, 10:44 AM · Performance Issue, Wikimedia-CentralNotice-Administration, Performance-Team
Peter created T243062: Investigate major increase in total page size.
Jan 17 2020, 10:42 AM · Performance Issue, Wikimedia-CentralNotice-Administration, Performance-Team

Jan 16 2020

Peter added a comment to T242903: Test Chrome 80.

Yes something sometimes is wrong with SSL, I've tried to reproduce on my local but no luck. However that seems to happens sometimes in one out five runs and the median is still ok when that happens.

Jan 16 2020, 1:25 PM · Performance-Team, WebPageReplay
Peter added a comment to T242903: Test Chrome 80.

I will try to reproduce this locally with the Chrome net log turned on.

Jan 16 2020, 8:50 AM · Performance-Team, WebPageReplay
Peter added a comment to T242903: Test Chrome 80.

Looking at different traces I could see the difference is in SSL setup. For the fast one it looks like this:

"sslEnd":404.751,"sslStart":100.466
Jan 16 2020, 8:17 AM · Performance-Team, WebPageReplay
Peter added a comment to T242903: Test Chrome 80.

I pushed beta of 80 yesterday and it looks like this:

Jan 16 2020, 8:10 AM · Performance-Team, WebPageReplay

Jan 15 2020

Peter created T242903: Test Chrome 80.
Jan 15 2020, 7:00 PM · Performance-Team, WebPageReplay

Jan 14 2020

Peter closed T242709: Update WebPageReplay documentation as Resolved.

Updated the documentation.

Jan 14 2020, 9:34 AM · Documentation, Performance-Team, WebPageReplay
Peter created T242709: Update WebPageReplay documentation.
Jan 14 2020, 7:42 AM · Documentation, Performance-Team, WebPageReplay

Jan 13 2020

Peter closed T159668: WebPageTest private server loads assets from Google as Declined.

I don't we will fix this, its too much work at the moment.

Jan 13 2020, 9:26 PM · Performance-Team, Upstream, WebPageTest
Peter closed T196242: Chrome 67 performance regression as Resolved.
Jan 13 2020, 9:25 PM · Performance-Team (Radar), Upstream
Peter closed T239339: Write performance calendar blog post about first input delay for Wikipedia as Resolved.
Jan 13 2020, 9:15 PM · Performance-Team
Peter moved T241036: Introduce staging test when upgrading new browser versions from Inbox to Backlog: Future Goals on the Performance-Team board.
Jan 13 2020, 9:11 PM · Performance-Team, WebPageReplay
Peter moved T242544: Investigate increase for start render enwiki mobile 2020-01-09 from Inbox to Doing on the Performance-Team board.
Jan 13 2020, 9:09 PM · WebPageTest, Performance-Team
Peter moved T242578: Testing multiple pages sometimes timeouts and pages aren't tested from Inbox to Radar on the Performance-Team board.
Jan 13 2020, 9:08 PM · Performance-Team (Radar), Upstream, WebPageReplay