2005417 - 20% regression on Motionmark-images subtest on Windows/Linux on 9Dec2025

Status: RESOLVED DUPLICATE of bug 2005273

(Core :: Performance: General, defect)

Description

[Mayank Bansal]

Linux: https://treeherder.mozilla.org/perfherder/graphs?highlightAlerts=1&highlightChangelogData=0&highlightCommonAlerts=0&replicates=0&selected=5050555,2202413286&series=autoland,5050555,1,13&timerange=5184000&zoom=1765059146956,1765447688195,98.57661940879402,252.93371830150397

Windows: https://treeherder.mozilla.org/perfherder/graphs?highlightAlerts=1&highlightChangelogData=0&highlightCommonAlerts=0&replicates=0&selected=5258104,2199784776&series=autoland,5258104,1,13&timerange=5184000&zoom=1765135268974,1765495403239,161.44078350354647,524.7667038353823

Regressed by: Bug 1873716

I do not know if this metric is tracked by sheriffs, or if this metric is important enough to even be monitored. Mostly filing this bug for posterity.
Feel free to WONTFIX etc.

Comment 1

[BugBot [:suhaib / :marco]]

Set release status flags based on info from the regressing bug 1873716

Comment 2

[Tom Ritter [:tjr]]

Taking the ni - I will try to profile this and understand what's adding all the time - we're not hashing anything... If there's a way to get an automatic profile that would be super helpful...

Comment 3

[Dan Mehic]

Moving to Performance:General, please adjust if this is not correct. Alternative might be Core:Privacy:Anti-Tracking.

Comment 4

[Tom Ritter [:tjr]]

First attempt: https://treeherder.mozilla.org/jobs?repo=try&revision=f8da11ecf17ede4fc38bd737b6fb550ea7b28758

(Higher is Better)

Linux:

• Original: 200ish
• Base: 152.12
• New: 164.47, 175.35, 175.9, 176.63, 179.25

Windows:

• Original: 425ish
• Base: 266.88
• New: 267.51, 276.92, 359.67, 364.3

Definitely an improvement, but not reaching the original scores yet.

Comment 5

[Tom Ritter [:tjr]]

Second attempt: https://treeherder.mozilla.org/jobs?repo=try&selectedTaskRun=ZM3hooCfQDaJi3HwVprvyQ.0&revision=3ce754a00ca53f3c69cbf5565899e4675abe41f6

I don't have the Linux results, but Windows jumped back to 444.63 so I think that's the answer.

Comment 6

[Tom Ritter [:tjr]]

This will be addressed in Bug 2005273