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RESOLVED FIXED
129074
[UI-Side Compositing] 6% of main thread time spent copying LayerProperties when adding to hash table
https://bugs.webkit.org/show_bug.cgi?id=129074
Summary
[UI-Side Compositing] 6% of main thread time spent copying LayerProperties wh...
Simon Fraser (smfr)
Reported
2014-02-19 16:38:38 PST
[UI-Side Compositing] 6% of main thread time spent copying LayerProperties when adding to hash table
Attachments
Patch
(30.12 KB, patch)
2014-02-19 16:41 PST
,
Simon Fraser (smfr)
thorton
: review+
Details
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proposed patch, testcase, etc.
Simon Fraser (smfr)
Comment 1
2014-02-19 16:39:13 PST
<
rdar://problem/15741031
>
Simon Fraser (smfr)
Comment 2
2014-02-19 16:41:41 PST
Created
attachment 224691
[details]
Patch
Tim Horton
Comment 3
2014-02-19 16:49:05 PST
Comment on
attachment 224691
[details]
Patch View in context:
https://bugs.webkit.org/attachment.cgi?id=224691&action=review
> Source/WebKit2/Shared/mac/RemoteLayerTreeTransaction.mm:214 > if (changedProperties & BackingStoreChanged) { > - encoder << backingStore.hasFrontBuffer(); > - if (backingStore.hasFrontBuffer()) > - encoder << backingStore; > + encoder << backingStore->hasFrontBuffer(); > + if (backingStore->hasFrontBuffer()) > + encoder << *backingStore; > }
What if BackingStoreChanged because it went away?? I guess we'll still have one, it'll just be one that doesn't paint.
Simon Fraser (smfr)
Comment 4
2014-02-19 17:58:45 PST
https://trac.webkit.org/r164405
Ryosuke Niwa
Comment 5
2014-02-21 00:05:44 PST
Looks like this was ~1.5% performance improvement on DoYouEvenBench:
https://perf.webkit.org/#mode=charts&chartList=%5B%5B%22mac-mavericks%22%2C%22DoYouEvenBench%2FFull%3ATime%3ATotal%22%5D%5D
Tim Horton
Comment 6
2014-02-21 00:07:33 PST
(In reply to
comment #5
)
> Looks like this was ~1.5% performance improvement on DoYouEvenBench: >
https://perf.webkit.org/#mode=charts&chartList=%5B%5B%22mac-mavericks%22%2C%22DoYouEvenBench%2FFull%3ATime%3ATotal%22%5D%5D
That would be a bit concerning, as this code isn't used at all on Mac at the moment.
Ryosuke Niwa
Comment 7
2014-02-21 00:46:37 PST
(In reply to
comment #6
)
> (In reply to
comment #5
) > > Looks like this was ~1.5% performance improvement on DoYouEvenBench: > >
https://perf.webkit.org/#mode=charts&chartList=%5B%5B%22mac-mavericks%22%2C%22DoYouEvenBench%2FFull%3ATime%3ATotal%22%5D%5D
> > That would be a bit concerning, as this code isn't used at all on Mac at the moment.
Okay. It's probably
http://trac.webkit.org/changeset/164401
then.
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