1835639 - 0.29 - 0.27% Base Content JS / Base Content JS (OSX) regression on Fri May 26 2023

Status: RESOLVED WONTFIX

(Core :: JavaScript Engine, defect)

Description

[Acasandrei Beatrice (needinfo me)]

Perfherder has detected a awsy performance regression from push f49b182be8f3ee54820984534a60245b4cbbc173. 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)
0.29%	Base Content JS	macosx1015-64-shippable-qr	fission	1,576,914.67 -> 1,581,432.00
0.27%	Base Content JS	macosx1015-64-shippable-qr	fission	1,577,157.33 -> 1,581,432.00

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 1811057

Comment 2

[Matthew Gaudet (he/him) [:mgaudet]]

These patches enabled a new JavaScript language feature -- we won't be fixing this one unfortunately.