1764950 - 3.26 - 2.51% google-slides fcp / google-slides fcp (Windows) regression on Wed April 6 2022

Status: RESOLVED WORKSFORME

(Firefox :: New Tab Page, defect)

Description

[Alex Finder]

Perfherder has detected a browsertime performance regression from push 848cac0abe46c6af79afee04a31eeee6cf07eaee. 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)
3%	google-slides fcp	windows10-64-shippable-qr	fission warm webrender	216.08 -> 223.12
3%	google-slides fcp	windows10-64-shippable-qr	fission warm webrender	215.88 -> 221.29

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)
29%	linkedin dcf	windows10-64-shippable-qr	cold fission webrender	1,779.71 -> 1,268.79
27%	linkedin dcf	linux1804-64-shippable-qr	cold fission webrender	1,797.88 -> 1,320.46
25%	linkedin dcf	linux1804-64-shippable-qr	cold fission webrender	1,777.15 -> 1,326.50
10%	twitch SpeedIndex	linux1804-64-shippable-qr	fission warm webrender	487.17 -> 436.83
9%	buzzfeed dcf	windows10-64-shippable-qr	fission warm webrender	545.12 -> 494.96
...	...	...	...	...
3%	bing SpeedIndex	android-hw-g5-7-0-arm7-shippable-qr	warm webrender	719.38 -> 698.75

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/ :calixte]]

Set release status flags based on info from the regressing bug 1762090

Comment 2

[Olli Pettay [:smaug][[e-mail]]]

Looks like mostly nice improvements.