1817397 - 0.43 - 0.42% Base Content JS / Base Content JS + 1 more (Linux, OSX, Windows) regression on Wed February 15 2023

Status: RESOLVED WONTFIX

(Core :: JavaScript: GC, defect)

Description

[Acasandrei Beatrice (needinfo me)]

Perfherder has detected a awsy performance regression from push 20c40d607f5ac4abaf9f617381d1f902434a616d. 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)
0.43%	Base Content JS	linux1804-64-shippable-qr	fission	1,642,430.86 -> 1,649,433.33
0.43%	Base Content JS	windows10-64-2004-shippable-qr	fission	1,649,048.00 -> 1,656,057.33
0.42%	Base Content JS	macosx1015-64-shippable-qr	fission	1,646,801.60 -> 1,653,769.33

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

[Jon Coppeard (:jonco)]

This is reporting memory that wasn't reported before, so there's no actual change. I imagine there was a corresponding reduction when bug 1786506 landed.