1944854 - 2.63 - 1.52% compiler_metrics num_static_constructors / compiler_metrics num_static_constructors + 2 more (Linux) regression on Wed January 29 2025

Status: RESOLVED WONTFIX

(Toolkit :: Gecko Trace, defect)

Description

[Treeherder Bug Filer]

Perfherder has detected a build_metrics performance regression from push 1ec7a703497189925a31ddb017de0f3277ac261b. 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%	compiler_metrics num_static_constructors	linux64		114.00 -> 117.00
3%	compiler_metrics num_static_constructors	linux64-aarch64		115.00 -> 118.00
2%	compiler_metrics num_static_constructors	linux64	base-toolchains-clang	164.00 -> 167.00
2%	compiler_metrics num_static_constructors	linux64	base-toolchains	197.00 -> 200.00

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.

You can run all of these tests on try with ./mach try perf --alert 43536

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

[BugBot [:suhaib / :marco]]

Set release status flags based on info from the regressing bug 1923143

Comment 2

[Michael van Straten [:michael]]

As discussed in the sheriffs channel, I will close this as WONTFIX since these are coming from a new third party lib. We might fix the constructors in upstream when they become a problem.