Maniphest T411784

Switch to use --headless as default in CI
Closed, ResolvedPublic1 Estimated Story Points
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	Peter
	Dec 4 2025, 2:09 PM

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Description

In T409392 we could see that switching to use --headless and increase default maxInstances to 4 will make the core tests be double as fast with a cost of 5% more CPU time. We should switch to headless to get that 2 time win in speed.

Acceptance criteria:

wdio-mediawiki use --headless by default in CI

Details

Related Changes in Gerrit:

	Subject	Repo	Branch	Lines +/-
	selenium: Use headless as default	mediawiki/core	master	+9 -7

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Related Objects
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		Status	Subtype	Assigned	Task
		Open		None	T417406 EPIC: Speed up quibble-with-gated-extensions-selenium-php83
		Open		None	T408361 Speed up quibble-with-gated-extensions-selenium-php83 - selenium/webdriverio
		Resolved		Peter	T411784 Switch to use --headless as default in CI

Event Timeline

Peter created this task.Dec 4 2025, 2:09 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptDec 4 2025, 2:09 PM

Peter mentioned this in T409392: Measure CI overhead using xvfb/ffmpeg vs --headlesss.Dec 4 2025, 2:09 PM

Change #1228313 had a related patch set uploaded (by Phedenskog; author: Phedenskog):

[mediawiki/core@master] selenium: Use headless as default

https://gerrit.wikimedia.org/r/1228313

gerritbot added a project: Patch-For-Review.Jan 19 2026, 7:44 AM

Peter mentioned this in T414904: Increase maxInstances for Core to run webdriverIO tests in parallel.Jan 19 2026, 8:29 AM

Peter mentioned this in T415057: Evaluate how to make it easy for the user to record videos in the CI for webdriverIO.Jan 20 2026, 12:55 PM

Peter added a project: Test Platform (Črnomerec 24).Tue, Feb 10, 4:17 PM

Peter mentioned this in T417038: Increase maxInstances to run webdriverIO tests in parallel.Tue, Feb 10, 4:28 PM

AMarkossyan-WMF moved this task from Črnomerec 24 to Wernigerode 23 on the Test Platform board.Tue, Feb 10, 4:39 PM

AMarkossyan-WMF edited projects, added Test Platform (Wernigerode 23); removed Test Platform (Črnomerec 24).

AMarkossyan-WMF assigned this task to Peter.Tue, Feb 10, 5:10 PM

AMarkossyan-WMF moved this task from Backlog to In Review on the Test Platform (Wernigerode 23) board.

Peter mentioned this in T417130: Implement changes for reduced CI overhead/increased speed for webdriverIO tests.Wed, Feb 11, 7:29 AM

zeljkofilipin moved this task from Backlog to Doing on the Browser Test Platform board.Fri, Feb 13, 1:03 PM

zeljkofilipin added a parent task: T408361: Speed up quibble-with-gated-extensions-selenium-php83 - selenium/webdriverio.Fri, Feb 13, 3:15 PM

Peter moved this task from In Review to Finishing Touches on the Test Platform (Wernigerode 23) board.Mon, Feb 16, 4:13 PM

Change #1228313 merged by jenkins-bot:

[mediawiki/core@master] selenium: Use headless as default

https://gerrit.wikimedia.org/r/1228313

ReleaseTaggerBot added a project: MW-1.46-notes (1.46.0-wmf.16; 2026-02-17).Mon, Feb 16, 6:00 PM

Maintenance_bot removed a project: Patch-For-Review.Mon, Feb 16, 6:31 PM

Peter closed this task as Resolved.Tue, Feb 17, 7:30 AM

Peter moved this task from Finishing Touches to Done on the Test Platform (Wernigerode 23) board.

Peter set the point value for this task to 1.Wed, Feb 18, 11:10 PM