1932838 - 304.93 - 8.1% imdb ContentfulSpeedIndex / expedia SpeedIndex + 10 more (Windows) regression on Sat November 16 2024

Status: RESOLVED FIXED

(Core :: Widget: Win32, defect)

Description

[Treeherder Bug Filer]

Perfherder has detected a browsertime performance regression from push 9d9fe1cd50ecbf6e8cf7eb4582bddb0c6bba76f3. 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
752%	google-slides largestContentfulPaint	windows11-64-shippable-qr	bytecode-cached fission warm webrender	87.76 -> 747.62	Before/After
305%	imdb ContentfulSpeedIndex	windows11-64-shippable-qr	cold fission webrender	576.77 -> 2,335.48	Before/After
301%	imdb LastVisualChange	windows11-64-shippable-qr	fission warm webrender	1,545.72 -> 6,198.74	Before/After
268%	imdb PerceptualSpeedIndex	windows11-64-shippable-qr	fission warm webrender	259.18 -> 953.85	Before/After
266%	imdb SpeedIndex	windows11-64-shippable-qr	fission warm webrender	253.43 -> 928.18	Before/After
225%	imdb ContentfulSpeedIndex	windows11-64-shippable-qr	fission warm webrender	251.71 -> 816.98	Before/After
171%	imdb LastVisualChange	windows11-64-shippable-qr	cold fission webrender	2,505.57 -> 6,782.60	Before/After
162%	imdb PerceptualSpeedIndex	windows11-64-shippable-qr	cold fission webrender	476.81 -> 1,250.73	Before/After
102%	imdb SpeedIndex	windows11-64-shippable-qr	cold fission webrender	461.92 -> 930.86	Before/After
43%	reddit-billgates-post-1.comments ContentfulSpeedIndex	windows11-64-shippable-qr	cold fission webrender	94.10 -> 134.71
...	...	...	...	...	...
16%	imdb loadtime	windows11-64-shippable-qr	fission warm webrender	1,023.73 -> 1,189.12	Before/After
14%	google-slides ContentfulSpeedIndex	windows11-64-shippable-qr	bytecode-cached fission warm webrender	486.71 -> 553.96	Before/After
11%	bing-search ContentfulSpeedIndex	windows11-64-shippable-qr	bytecode-cached cold fission webrender	267.35 -> 297.32	Before/After
11%	bing-search PerceptualSpeedIndex	windows11-64-shippable-qr	bytecode-cached cold fission webrender	301.82 -> 333.68	Before/After
8%	expedia SpeedIndex	windows11-64-shippable-qr	cold fission webrender	496.97 -> 537.24	Before/After

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)	Performance Profiles
26%	wikipedia LastVisualChange	windows11-64-shippable-qr	bytecode-cached cold fission webrender	1,009.49 -> 747.44	Before/After
10%	wikia SpeedIndex	windows11-64-shippable-qr	cold fission webrender	626.35 -> 565.31	Before/After
10%	wikia SpeedIndex	windows11-64-shippable-qr	fission warm webrender	325.78 -> 294.67	Before/After
9%	wikia SpeedIndex	windows11-64-shippable-qr	cold fission webrender	634.45 -> 577.43	Before/After
8%	wikia PerceptualSpeedIndex	windows11-64-shippable-qr	cold fission webrender	566.27 -> 520.92	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 42749

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

[Emilio Cobos Álvarez [:emilio]]

Fixed by backout.