1950957 - [wpt-sync] Sync PR 51001 - Set LimitLayerMergeDistance:limit/16 by default

Status: RESOLVED FIXED

(Core :: Layout: Images, Video, and HTML Frames, task, P4)

Description

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Sync web-platform-tests PR 51001 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/51001
Details from upstream follow.

Xianzhu Wang <[e-mail]> wrote:

Set LimitLayerMergeDistance:limit/16 by default

The number is chosen kind of arbitrarily. It doesn't seem to affect
speedometer3 [1] and motionmark [2], but improves performance in the
bug case (before we optimize generation of PaintChunks). Hopefully it
will prevent worst case of layerization performance while doesn't
change layerization results very much.

(These were tested with limit/8)
[1] https://pinpoint-dot-chromeperf.appspot.com/job/1674832fa10000
[2] https://pinpoint-dot-chromeperf.appspot.com/job/13c01c68610000

Bug: 40929618
Change-Id: I8b509006c0b73dcef003fcb71ca180c6617b7259
Reviewed-on: https://chromium-review.googlesource.com/6287967
WPT-Export-Revision: 81000172b3ba3b910ad3604893d090ca2169bf82

Comment 1

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=566ead87988725d9e760d6a545ad488c2fa95ffa

Comment 2

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

CI Results

Ran 7 Firefox configurations based on mozilla-central, and Firefox, Chrome, and Safari on GitHub CI

Total 4 tests

Status Summary

Firefox

PASS: 4

Chrome

PASS: 4

Safari

PASS: 4

Links

Gecko CI (Treeherder)
GitHub PR Head
GitHub PR Base

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/e0c9d3a49021
[wpt PR 51001] - Set LimitLayerMergeDistance:limit/16 by default, a=testonly

Comment 4

[Cristian Tuns]

https://hg.mozilla.org/mozilla-central/rev/e0c9d3a49021