1921755 - 4.37% tresize (Linux) regression on Mon September 16 2024

Status: RESOLVED WONTFIX

(Core :: Layout, defect)

Description

[Treeherder Bug Filer]

Perfherder has detected a talos performance regression from push 308329f23acd5524dbb5b2a8179690a8bc60709f. 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)
4%	tresize	linux1804-64-shippable-qr	e10s fission stylo webrender	22.33 -> 23.31

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)
3%	tart	macosx1015-64-shippable-qr	e10s fission stylo webrender-sw	1.92 -> 1.87
3%	tart	macosx1015-64-shippable-qr	e10s fission stylo webrender-sw	1.93 -> 1.87

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 all of these tests on try with ./mach try perf --alert 2281

The following documentation link provides more information about this command.

For more information on performance sheriffing please see our FAQ.

If you have any questions, please do not hesitate to reach out to [e-mail].

Comment 1

[Emilio Cobos Álvarez (:emilio)]

I'm a bit confused, https://bugzilla.mozilla.org/show_bug.cgi?id=1917458#c20 seemed to mean that this was a (much more massive) tresize improvement?

Comment 2

[Emilio Cobos Álvarez (:emilio)]

Ah, I guess that was a different push. I think this is wontfix, is part of work that all-in-all ended up in a 15% tresize improvement.