1906409 - 2.23 - 2.07% speedometer3 NewsSite-Nuxt/NavigateToWorld/Sync / speedometer3 NewsSite-Nuxt/NavigateToPolitics/Sync (OSX) regression on Wed June 26 2024

Status: RESOLVED WONTFIX

(Core :: Memory Allocator, defect)

Description

[Andra Esanu (needinfo me)]

Perfherder has detected a browsertime performance regression from push f72b2832f50fb56b4dc4de970a27abe66ae697c3. 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
2%	speedometer3 NewsSite-Nuxt/NavigateToWorld/Sync	macosx1400-64-shippable-qr	fission webrender	5.58 -> 5.70	Before/After
2%	speedometer3 NewsSite-Nuxt/NavigateToPolitics/Sync	macosx1400-64-shippable-qr	fission webrender	5.52 -> 5.63	Before/After

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)	Performance Profiles
4%	speedometer3 Charts-observable-plot/Dotted/Async	macosx1015-64-shippable-qr	fission webrender	6.31 -> 6.09	Before/After
3%	speedometer3 Charts-observable-plot/Stacked by 20/Async	macosx1400-64-shippable-qr	fission webrender	3.32 -> 3.22	Before/After
3%	speedometer Elm-TodoMVC/CompletingAllItems/Async	macosx1015-64-shippable-qr	fission webrender	2.55 -> 2.48	Before/After
2%	speedometer3 TodoMVC-Preact-Complex-DOM/Adding100Items/total	macosx1015-64-shippable-qr	fission webrender	13.79 -> 13.45	Before/After
2%	speedometer React-Redux-TodoMVC/CompletingAllItems/Async	macosx1015-64-shippable-qr	fission webrender	2.33 -> 2.28	Before/After
...	...	...	...	...	...
2%	speedometer EmberJS-TodoMVC/CompletingAllItems/Async	macosx1015-64-shippable-qr	fission webrender	2.42 -> 2.37	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.

If you need the profiling jobs you can trigger them yourself from treeherder job view or ask a sheriff to do that for you.

You can run these tests on try with ./mach try perf --alert 978

For more information on performance sheriffing please see our FAQ.

Comment 1

[Paul Bone [:pbone]]

I'm happy with this change since more tests improve performance than regress. When I measured there were also quite a few page load performance improvements.