1764377 - 16.45 - 3.13% google-slides FirstVisualChange / google-slides dcf + 2 more (Windows) regression on Thu April 7 2022

Status: RESOLVED FIXED

(Core :: Graphics: ImageLib, defect)

Description

[Alexandru Ionescu (needinfo me) [:alexandrui]]

Perfherder has detected a browsertime performance regression from push 4a5f91ff2e40528e957b2bb5b351bed3c134a981. As author of one of the patches included in that push, we need your help to address this regression.

Regressions:

Ratio	Test	Platform	Options	Absolute values (old vs new)
16%	google-slides FirstVisualChange	windows10-64-shippable-qr	fission warm webrender	272.08 -> 316.83
6%	google-slides PerceptualSpeedIndex	windows10-64-shippable-qr	fission warm webrender	623.00 -> 663.42
6%	google-slides SpeedIndex	windows10-64-shippable-qr	fission warm webrender	590.56 -> 628.67
3%	google-slides dcf	windows10-64-shippable-qr	fission warm webrender	806.25 -> 831.50

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)
7%	youtube-watch loadtime	android-hw-g5-7-0-arm7-shippable-qr	cold webrender	1,985.88 -> 1,850.50

Details of the alert can be found in the alert summary, including links to graphs and comparisons for each of the affected tests. Please follow our guide to handling regression bugs and let us know your plans within 3 business days, or the offending patch(es) will be backed out in accordance with our regression policy.

For more information on performance sheriffing please see our FAQ.

Comment 1

[BugBot [:suhaib / :marco]]

Set release status flags based on info from the regressing bug 1763643

Comment 2

[Ryan VanderMeulen [:RyanVM]]

Disabled by way of bug 1766333.