1880489 - 3.26 - 3.17% startup_about_home_paint_cached / startup_about_home_paint_cached (Windows) regression on Thu February 8 2024

Status: RESOLVED FIXED

(Core :: Security: Process Sandboxing, defect, P2)

Description

[Andrej (:aglavic)]

Perfherder has detected a talos performance regression from push ee7693ef6d0d8930b8b627e6684c93b002776491. 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)
3%	startup_about_home_paint_cached	windows10-64-shippable-qr	e10s fission stylo webrender-sw	552.88 -> 570.92
3%	startup_about_home_paint_cached	windows10-64-shippable-qr	e10s fission stylo webrender-sw	553.96 -> 571.50

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 41484

For more information on performance sheriffing please see our FAQ.

Comment 1

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

Set release status flags based on info from the regressing bug 1877957

Comment 2

[Bob Owen (:bobowen)]

This sandbox improvement is Nightly only at the moment.
If we do decide to backout even on Nightly only the final patch D200796 (https://hg.mozilla.org/mozilla-central/rev/ee7693ef6d0d) would need to be backed out. That is the pref flip.

Comment 3

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

Set release status flags based on info from the regressing bug 1877957

Comment 4

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

The severity field is not set for this bug.
:gcp, could you have a look please?

For more information, please visit BugBot documentation.

Comment 5

[Bob Owen (:bobowen)]

Untrusted integrity is now enabled on Nightly without these regressions reappearing because of the fix in patch 1 of bug 1889932 .