fast/animation/request-animation-frame-throttling-lowPowerMode.html has recently become a flaky failure on macOS release bots; --- /Volumes/Data/slave/bigsur-release-tests-wk2/build/layout-test-results/fast/animation/request-animation-frame-throttling-lowPowerMode-expected.txt +++ /Volumes/Data/slave/bigsur-release-tests-wk2/build/layout-test-results/fast/animation/request-animation-frame-throttling-lowPowerMode-actual.txt @@ -3,7 +3,7 @@ On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". -PASS framesPerSecond < 35 is true +FAIL framesPerSecond < 35 should be true. Was false. PASS successfullyParsed is true TEST COMPLETE https://results.webkit.org/?suite=layout-tests&test=fast%2Fanimation%2Frequest-animation-frame-throttling-lowPowerMode.html
<rdar://problem/74290541>
It looks like this test first failed with r272702 and r272703, then passed consistently until r272784. r272705 was a revert of r272702, which was re-landed in r272784. I haven't confirmed locally, but this suggests that r272784 is indeed the regression point.
Created attachment 420189 [details] Patch
r272824