1906251 - 14.57 - 8.54% perf_reftest_singletons id-getter-7.html / perf_reftest_singletons parent-basic-singleton.html + 4 more (Linux, Windows) regression on Sat June 29 2024

Status: RESOLVED INVALID

(Testing :: Performance, defect)

Description

[Acasandrei Beatrice (needinfo me)]

Perfherder has detected a talos performance regression from push a5ff95602119ac2c4e97a4d8915da5a0cd29373d. 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)
15%	perf_reftest_singletons id-getter-7.html	windows11-64-qr	e10s fission stylo webrender	471.96 -> 540.71
14%	perf_reftest_singletons id-getter-6.html	windows11-64-qr	e10s fission stylo webrender	471.19 -> 537.42
14%	perf_reftest_singletons id-getter-3.html	windows11-64-qr	e10s fission stylo webrender	472.16 -> 536.88
14%	perf_reftest_singletons id-getter-5.html	windows11-64-qr	e10s fission stylo webrender	473.80 -> 538.47
14%	perf_reftest_singletons id-getter-4.html	windows11-64-qr	e10s fission stylo webrender	471.88 -> 536.15
9%	perf_reftest_singletons parent-basic-singleton.html	linux1804-64-shippable-qr	e10s fission stylo webrender	101.96 -> 110.67

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)
10%	cpstartup content-process-startup	windows10-64-shippable-qr	e10s fission stylo webrender	69.36 -> 62.75
9%	cpstartup content-process-startup	windows11-64-qr	e10s fission stylo webrender	44.08 -> 39.92
9%	cpstartup content-process-startup	windows10-64-shippable-qr	e10s fission stylo webrender-sw	69.38 -> 63.17
8%	cpstartup content-process-startup	windows11-64-shippable-qr	e10s fission stylo webrender	39.67 -> 36.33

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 1182

For more information on performance sheriffing please see our FAQ.