1878843 - 9.1 - 4.06% yahoo-mail FirstVisualChange / yahoo-mail PerceptualSpeedIndex + 1 more (OSX) regression on Wed January 31 2024

Status: RESOLVED WONTFIX

(Testing :: Raptor, defect)

Description

[Acasandrei Beatrice (needinfo me)]

Perfherder has detected a browsertime performance regression from push e0dd05f7816f3194d0a0a1d44ea0ebc55454b442. 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
9%	yahoo-mail FirstVisualChange	macosx1015-64-shippable-qr	bytecode-cached cold fission webrender	228.07 -> 248.83	Before/After
8%	yahoo-mail SpeedIndex	macosx1015-64-shippable-qr	bytecode-cached cold fission webrender	267.75 -> 288.28	Before/After
4%	yahoo-mail PerceptualSpeedIndex	macosx1015-64-shippable-qr	bytecode-cached cold fission webrender	337.26 -> 350.94	Before/After

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)	Performance Profiles
30%	facebook-nav.friends ContentfulSpeedIndex	windows10-64-shippable-qr	cold fission webrender	349.71 -> 245.58	Before/After
27%	instagram ContentfulSpeedIndex	windows10-64-shippable-qr	bytecode-cached fission warm webrender	293.96 -> 213.67	Before/After
26%	facebook-nav.friends ContentfulSpeedIndex	linux1804-64-shippable-qr	cold fission webrender	277.59 -> 205.42	Before/After
26%	facebook-nav.marketplace ContentfulSpeedIndex	windows10-64-shippable-qr	cold fission webrender	422.80 -> 313.62	Before/After
21%	outlook ContentfulSpeedIndex	windows10-64-shippable-qr	cold fission webrender	798.74 -> 629.13	Before/After
...	...	...	...	...	...
4%	cnn ContentfulSpeedIndex	windows10-64-shippable-qr	cold fission webrender	848.41 -> 817.08	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 these tests on try with ./mach try perf --alert 41278

For more information on performance sheriffing please see our FAQ.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1762951

Comment 2

[:Gijs (he/him)]

From the patch:

! In D200154#6870530, @sparky wrote:
r+, thanks for taking care of this!

I checked the videos for the youtube test, and I can confirm that we no longer see the statuspanel in them. Something to note is that this patch might trigger an alert, but we'll be able to accept them as wontfix.

So passing this one to Sparky.

Comment 3

[Greg Mierzwinski [:sparky]]

We can accept these as wontfix because it's a harness change. The statuspanel is no longer visible in the videos and this changed the scores for some metrics.