1763705 - 46.48 - 4.88% welcome FirstVisualChange / welcome FirstVisualChange + 1 more (OSX, Windows) regression on Fri April 1 2022

Status: RESOLVED DUPLICATE of bug 1763666

(Firefox :: Messaging System, defect)

Description

[Alex Finder]

Perfherder has detected a browsertime performance regression from push 53e6fbe77dff1c74b11e1903ccf3084a39f90cd0. 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)
46%	welcome FirstVisualChange	windows10-64-shippable-qr	cold fission webrender	118.33 -> 173.33
31%	welcome ContentfulSpeedIndex	windows10-64-shippable-qr	cold fission webrender	435.71 -> 571.75
5%	welcome FirstVisualChange	macosx1015-64-shippable-qr	cold fission webrender	1,230.00 -> 1,290.00

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)
20%	welcome SpeedIndex	windows10-64-shippable-qr	cold fission webrender	272.83 -> 217.17
12%	welcome ContentfulSpeedIndex	windows10-64-shippable-qr	cold fission webrender	611.17 -> 534.92
11%	welcome fcp	windows10-64-shippable-qr	cold fission webrender	107.12 -> 95.50

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/ :calixte]]

Set release status flags based on info from the regressing bug 1762289