Bug 192284
Summary: | EditorState code triggers additional layer flushes | ||
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Product: | WebKit | Reporter: | Simon Fraser (smfr) <simon.fraser> |
Component: | HTML Editing | Assignee: | Nobody <webkit-unassigned> |
Status: | NEW | ||
Severity: | Normal | CC: | ap, rniwa, simon.fraser, wenson_hsieh |
Priority: | P2 | ||
Version: | WebKit Nightly Build | ||
Hardware: | Unspecified | ||
OS: | Unspecified |
Simon Fraser (smfr)
There are two code paths that trigger compositing layer flushes that would otherwise not happen; this may cause extra painting, which has a perf cost.
They are WebPage::sendPartialEditorStateAndSchedulePostLayoutUpdate() and WebPage::sendEditorStateUpdate(). I see these get called when running this Speedometer subtest:
http://browserbench.org/Speedometer2.0/?suite=VueJS-TodoMVC&iterationCount=100
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