2092830 - 7.79% stackoverflow SpeedIndex (Android) regression on Sat November 7 2026

Status: NEW

(Core :: Graphics: WebRender, defect)

Description

[Performance Sheriff Bot]

Perfherder has detected a browsertime performance regression from push 971e2e10f2924bac5295de41088a4e38ceb4f4ed. As author of one of the patches included in that push, we need your help to address this regression.

Please acknowledge, and begin investigating this alert within 3 business days, or the patch(es) may be backed out in accordance with our regression policy.

Regression	Test	Platform	Options	Absolute values [old vs new]
8%	stackoverflow SpeedIndex (doc)	android-hw-a55-14-0-aarch64-shippable	fission warm webrender	187.74 -> 202.37

Support & Actionable Steps

For questions, please contact [e-mail]. You can also find help on Slack (#perf-help) or Matrix (#perftest).

Action guide details:

• See the guide to handling regression bugs for investigation steps.
• Review the alert summary for affected tests, graphs, and comparisons.
• Check the PerfCompare results.
• Tests on Try: Run all tests using ./mach try perf --alert 54328 (See documentation link for details).
• Test locally: To run the tests locally use ./mach perftest 54328
• Profiling jobs: Trigger jobs from Treeherder job view or request them from [e-mail].

Comment 1

[BugBot [:suhaib / :marco]]

Set release status flags based on info from the regressing bug 2090202

Comment 2

[Emilio Cobos Álvarez [:emilio]]

Nical, this is a regression from turning WR svg clips, any chance you have cycles to investigate? If not, I can.