STR: 1. Enable webrender 2. Open some video (Youtube etc...) 3. Scroll the page Expected results Video shows normally any time. Actual results (In my case) Left side of video didn't show and clipping area moves while scrolling. Regression range autoland Last OK:74d97073c54b First NG:1e214baf8fc1 So, caused by Bug 1503447. Interestingly, in my PC, this problem happens only 64bit version.
Status: UNCONFIRMED → NEW
Has Regression Range: --- → yes
Has STR: --- → yes
Ever confirmed: true
OS: Unspecified → All
Priority: -- → P3
Version: unspecified → Trunk
If I open https://old.reddit.com/r/AnimalsBeingBros/comments/a1gyif/cat_high_fives_runners/, the autoplaying video goes black almost immediately after it starts playing. Reproduces on both 32-bit and 64-bit builds.
We should probably back out the patches from bug 1503447 that are relevant here (1e214baf8fc1 + followups 7d4adeee5236 and f5ffebdcc014)
per comment 3
Priority: P2 → P1
I'll do the backout.
Assignee: nobody → kats
Pushed by firstname.lastname@example.org: https://hg.mozilla.org/integration/mozilla-inbound/rev/9358169404d1 Back out some commits from bug 1503447 for introducing correctness and perf regressions. r=backout
It would be good to add reftests covering this, if we want the changes to re-land at some point. Thanks for backout!
this generated a performance improvement == Change summary for alert #18052 (as of Thu, 06 Dec 2018 08:28:02 GMT) == Improvements: 15% displaylist_mutate windows10-64-qr opt e10s stylo 4,539.79 -> 3,860.38 For up to date results, see: https://treeherder.mozilla.org/perf.html#/alerts?id=18052
And brought back at least one Raptor baseline: == Change summary for alert #17949 (as of Fri, 30 Nov 2018 01:16:57 GMT) == Improvements: 2% raptor-motionmark-htmlsuite-firefox opt 56.24 -> 57.63 For up to date results, see: https://treeherder.mozilla.org/perf.html#/alerts?id=17949
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