1817841 - 13.22 - 2.57% stylebench / motionmark-htmlsuite + 1 more (Linux, Windows) regression on Tue February 14 2023

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, defect, P2)

Description

[Andra Esanu (needinfo me)]

Perfherder has detected a browsertime performance regression from push 005f973722f7e65152f284acdc8989e4b820cf22. 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
13%	stylebench	windows10-64-shippable-qr	fission webrender	53.07 -> 46.05	Before/After
12%	stylebench	windows10-64-shippable-qr	fission webrender	53.07 -> 46.49	Before/After
3%	motionmark-htmlsuite	linux1804-64-shippable-qr	fission webrender	59.70 -> 58.17	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 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 1811978

Comment 2

[Glenn Watson [:gw]]

I'm going to back out the regressing patch temporarily, and fix the underlying cause of the regression that this patch exposes.

Comment 3

[Glenn Watson [:gw]]

This should be resolved by the patch that was backed out above - can you confirm?

Comment 4

[Andra Esanu (needinfo me)]

(In reply to Glenn Watson [:gw] from comment #3)

This should be resolved by the patch that was backed out above - can you confirm?

Yes, it's fixed. Thank you.

Comment 5

[Dianna Smith [:diannaS]]

fixed by backout