1866449 - 5.99 - 4.2% outlook ContentfulSpeedIndex / outlook ContentfulSpeedIndex + 2 more (Linux, OSX) regression on Mon November 20 2023

Status: RESOLVED WONTFIX

(Core :: Layout, defect)

Description

[Acasandrei Beatrice (needinfo me)]

Perfherder has detected a browsertime performance regression from push 4124706aa8eb96927ef4eb64fae1cf309d72f085. 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)	Performance Profiles
6%	outlook ContentfulSpeedIndex	linux1804-64-shippable-qr	fission warm webrender	736.96 -> 781.08	Before/After
5%	imdb LastVisualChange	macosx1015-64-shippable-qr	fission warm webrender	788.21 -> 826.71	Before/After
5%	outlook ContentfulSpeedIndex	linux1804-64-shippable-qr	fission warm webrender	746.15 -> 780.30	Before/After
4%	outlook ContentfulSpeedIndex	linux1804-64-shippable-qr	fission warm webrender	746.04 -> 777.40	Before/After

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)	Performance Profiles
3%	buzzfeed LastVisualChange	linux1804-64-shippable-qr	fission warm webrender	1,448.02 -> 1,405.12	Before/After

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 patch(es) may be backed out in accordance with our regression policy.

If you need the profiling jobs you can trigger them yourself from treeherder job view or ask a sheriff to do that for you.

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 1857618

Comment 2

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

The patch did improve some subtests for sp3 though, NewsSite-* and Editor-*.
So I think as of now, this is wontfix.