1991708 - 5.38% bing-search-restaurants FirstVisualChange (Android) regression on Mon September 22 2025

Status: RESOLVED FIXED

(Firefox for Android :: Bookmarks, defect)

Description

[Treeherder Bug Filer]

Perfherder has detected a browsertime performance regression from push 76437befd0714583c6a6a41a60d7de53618841a4. 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. Our guide to handling regression bugs has information about how you can proceed with this investigation.

If you have any questions or need any help with the investigation, please reach out to [e-mail]. Alternatively, you can find help on Slack by joining #perf-help, and on Matrix you can find help by joining #perftest.

Regressions:

Ratio	Test	Platform	Options	Absolute values (old vs new)
5%	bing-search-restaurants FirstVisualChange	android-hw-a55-14-0-aarch64-shippable	warm webrender	156.35 -> 164.76

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)
4%	speedometer3 TodoMVC-Preact-Complex-DOM/Adding100Items/Async	android-hw-a55-14-0-aarch64-shippable	webrender	17.72 -> 16.97

Details of the alert can be found in the alert summary, including links to graphs and comparisons for each of the affected tests.

If you need the profiling jobs you can trigger them yourself from treeherder job view or ask [e-mail] to do that for you.

You can run all of these tests on try with ./mach try perf --alert 46902

The following documentation link provides more information about this command.

Comment 1

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

Set release status flags based on info from the regressing bug 1988638

Comment 2

[Iorga Gabriel]

I don't think this regression is from this bug

Comment 3

[Pascal Chevrel:pascalc]

Alex, could you double check the regression range? Thanks

Comment 4

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

Set release status flags based on info from the regressing bug 1988638

Comment 5

[Alex Finder]

Looking at the graph now, it seems the results have reverted to the previous trend, before the regression was introduced, closing current bug as "Fixed".