1789619 - 30.7 - 4.44% espn FirstVisualChange / espn ContentfulSpeedIndex (Windows) regression on Sat September 3 2022

Status: RESOLVED FIXED

(Core :: Layout, defect)

Description

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

Perfherder has detected a browsertime performance regression from push f67b16cac9e0eecb5c1a067c43fadd954c0f071e. 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)
31%	espn FirstVisualChange	windows10-64-shippable-qr	cold fission webrender	497.33 -> 650.00
4%	espn ContentfulSpeedIndex	windows10-64-shippable-qr	cold fission webrender	767.00 -> 801.08

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)
23%	pinterest FirstVisualChange	macosx1015-64-shippable-qr	fission warm webrender	470.00 -> 363.33

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

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Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1788125