1865819 - 35.31% motionmark-animometer-ramp (Windows) regression on Tue November 21 2023

Status: RESOLVED FIXED

(Core :: Security: Process Sandboxing, defect)

Description

[Acasandrei Beatrice (needinfo me)]

Perfherder has detected a browsertime performance regression from push 4a6ed43174388497963a5e476b2b22e495ba088e. 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
35%	motionmark-animometer-ramp	windows10-64-shippable-qr	fission webrender	650.01 -> 420.50	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 patch(es) may be backed out in accordance with our regression policy.

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Comment 1

[Donal Meehan [:dmeehan]]

Tracking based on the size of the perf change, but can revisit once triaged

Comment 2

[Olli Pettay [:smaug][[e-mail]]]

Likely also https://treeherder.mozilla.org/perfherder/graphs?highlightAlerts=1&highlightChangelogData=1&highlightCommonAlerts=0&series=autoland,4831346,1,13&timerange=1209600

Comment 3

[Donal Meehan [:dmeehan]]

Setting Fx122 to fixed, the regressor was backed out of central

Comment 4

[Donal Meehan [:dmeehan]]

The test has returned to the same values after the backout.