1958796 - 8.35% newssite-applink-startup applink_startup (Android) regression on Tue April 1 2025

Status: RESOLVED INVALID

(Thunderbird :: Upstream Synchronization, defect)

Description

[Treeherder Bug Filer]

Perfherder has detected a mozperftest performance regression from push a0a0bb8d446e8fb611bc38ea9697d9d38dcffdaf. 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)
8%	newssite-applink-startup applink_startup	android-hw-a55-14-0-aarch64-shippable		2,281.22 -> 2,471.76

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 44593

The following documentation link provides more information about this command.

Comment 1

[Magnus Melin [:mkmelin]]

Seems basically impossible my patch would have caused that.
The patch is test-only, and only affecting one test - and that test isn't even enabled at all on Android. https://searchfox.org/mozilla-central/rev/380b8fd795e7d96d8a5a3e6ec2b50a9f2b65854a/toolkit/components/telemetry/dap/tests/xpcshell/xpcshell.toml#4

Comment 2

[Magnus Melin [:mkmelin]]

Marking this invalid per above.