1735291 - 23.54 - 8% google-slides ContentfulSpeedIndex / google-slides loadtime + 5 more (Windows) regression on Fri October 8 2021

Status: RESOLVED FIXED

(Core :: DOM: Content Processes, defect)

Description

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

Perfherder has detected a browsertime performance regression from push a11b32e4aa7b14d32e1a358cad0dfa193e4ca75c. 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)
24%	google-slides ContentfulSpeedIndex	windows10-64-shippable-qr	warm webrender	685.75 -> 847.17
20%	google-slides dcf	windows10-64-shippable-qr	warm webrender	682.96 -> 818.33
19%	google-slides PerceptualSpeedIndex	windows10-64-shippable-qr	warm webrender	501.33 -> 595.33
16%	google-slides SpeedIndex	windows10-64-shippable-qr	warm webrender	503.42 -> 586.33
15%	google-slides fnbpaint	windows10-64-shippable-qr	warm webrender	196.38 -> 225.33
12%	google-slides fcp	windows10-64-shippable-qr	warm webrender	194.62 -> 217.46
8%	google-slides loadtime	windows10-64-shippable-qr	warm webrender	1,064.08 -> 1,149.17

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 1725539

Comment 2

[Paul Bone [:pbone]]

Bug 1725539 was backed-out.