1817423 - 55568.08 - 37191.66% twitch-animation / twitch-animation + 1 more (Linux, OSX, Windows) regression on Thu February 9 2023

Status: RESOLVED WONTFIX

(Core :: Performance, defect)

Description

[Alex Finder]

Perfherder has detected a browsertime performance regression from push 970bcb73de2cd98cefdd56aa7a8e92ab719aff3e. 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
55568%	twitch-animation	macosx1015-64-shippable-qr	fission webrender	21.65 -> 12,050.28	Before/After
44241%	twitch-animation	windows10-64-shippable-qr	fission webrender	27.26 -> 12,088.49	Before/After
37192%	twitch-animation	linux1804-64-shippable-qr	fission webrender	32.43 -> 12,093.07	Before/After

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)	Performance Profiles
5%	instagram SpeedIndex	linux1804-64-shippable-qr	bytecode-cached fission warm webrender	543.67 -> 516.67	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

[Alex Finder]

Hi sparky! Should we close this alert and bug as WON'T FIX ?

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1813515

Comment 3

[Greg Mierzwinski [:sparky]]

Yup, WONTFIX sounds good to me, thanks! The issue here happened because we changed how the summary is calculated.