1927803 - 25.81 - 12.57% speedometer3 Perf-Dashboard/SelectingPoints/total / speedometer3 Charts-chartjs/Show tooltip/Sync (Windows) regression on Thu October 17 2024

Status: RESOLVED WONTFIX

(Core :: Graphics: Canvas2D, defect)

Description

[Treeherder Bug Filer]

Perfherder has detected a browsertime performance regression from push fe10049200dfa92f958f65b9fc37fef345694b41. 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)	Performance Profiles
26%	speedometer3 Perf-Dashboard/SelectingPoints/total	windows11-64-nightlyasrelease-qr	fission webrender	25.59 -> 32.19	Before/After
22%	speedometer3 Perf-Dashboard/SelectingPoints/Sync	windows11-64-nightlyasrelease-qr	fission webrender	23.53 -> 28.60	Before/After
21%	speedometer3 Perf-Dashboard/SelectingPoints/total	windows11-64-nightlyasrelease-qr	fission webrender	25.55 -> 30.81	Before/After
13%	speedometer3 Charts-chartjs/Show tooltip/Sync	windows11-64-nightlyasrelease-qr	fission webrender	0.15 -> 0.17	Before/After
5%	speedometer3 total	windows11-64-nightlyasrelease-qr	fission webrender	1,157.99 -> 1,210.58	Before/After
4%	speedometer3 score	windows11-64-nightlyasrelease-qr	fission webrender	20.87 -> 20.09	Before/After
4%	speedometer3	windows11-64-nightlyasrelease-qr	fission webrender	20.87 -> 20.09	Before/After

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)	Performance Profiles
14%	imdb loadtime	windows11-64-shippable-qr	fission warm webrender	1,220.78 -> 1,052.74	Before/After
13%	speedometer3 Charts-chartjs/Show tooltip/total	windows11-64-shippable-qr	fission webrender	11.14 -> 9.65	Before/After
13%	imdb LastVisualChange	windows11-64-shippable-qr	fission warm webrender	1,332.76 -> 1,160.93	Before/After
13%	speedometer3 Charts-chartjs/Show tooltip/Async	windows11-64-shippable-qr	fission webrender	10.90 -> 9.50	Before/After
13%	speedometer3 Charts-chartjs/Show tooltip/total	windows11-64-shippable-qr	fission webrender	11.06 -> 9.64	Before/After
...	...	...	...	...	...
4%	speedometer3 Perf-Dashboard/SelectingRange/total	windows11-64-shippable-qr	fission webrender	25.05 -> 23.97	Before/After

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 all of these tests on try with ./mach try perf --alert 2517

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/ :calixte]]

Set release status flags based on info from the regressing bug 1910138

Comment 3

[Lee Salzman [:lsalzman]]

There is necessarily going to be some performance churn, plus and minus, as a result of enabling Accelerated Canvas2D. It has different performance characteristics than Direct2D on Windows.