1809161 - 4.35% tart (OSX) regression on Wed January 4 2023

Status: RESOLVED WONTFIX

(Firefox :: Menus, defect)

Description

[Andrej (:aglavic)]

Perfherder has detected a talos performance regression from push 47c002d3637247e71ee901f32421deaecc9d8ea3. 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)
4%	tart	macosx1015-64-shippable-qr	e10s fission stylo webrender-sw	2.42 -> 2.52

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)
4%	tart	linux1804-64-shippable-qr	e10s fission stylo webrender	4.01 -> 3.86

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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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 1805414

Comment 2

[Emilio Cobos Álvarez (:emilio)]

Seems like a rather minor change, with an equivalent improvement on Linux. I think we should just take this, probably doesn't deserve much deeper of an investigation... Mildly curious about why bug 1805414 would be faster on Linux but slower on macOS, but different styling on different platforms might cause that.

Comment 3

[:Gijs (he/him)]

I concur with comment #2, this doesn't seem worth losing sleep over.