RESOLVED FIXED 256073
RemoteImageBufferProxyFlushState::waitForDidFlushOnSecondaryThread blocks on a task running on the main thread. 
https://bugs.webkit.org/show_bug.cgi?id=256073
Summary RemoteImageBufferProxyFlushState::waitForDidFlushOnSecondaryThread blocks on ...
Matt Woodrow
Reported 2023-04-27 21:30:42 PDT
We attempt to wait for flushes of RemoteImageBufferProxy on a background thread, but the 'didFlush' IPC message is received on the main thread. This can mean it gets delayed (and we don't know the flush is completed) if the main thread is otherwise busy. This delays first-paint on CPLT.
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Radar WebKit Bug Importer
Comment 1 2023-04-27 21:31:00 PDT
<rdar://problem/108642579>
Matt Woodrow
Comment 2 2023-04-27 21:43:56 PDT
Pull request: https://github.com/WebKit/WebKit/pull/13261
EWS
Comment 3 2023-05-01 23:39:07 PDT
Committed 263572@main (4d14bfb53b47): <https://commits.webkit.org/263572@main> Reviewed commits have been landed. Closing PR #13261 and removing active labels.
WebKit Commit Bot
Comment 4 2023-05-02 09:51:21 PDT
Re-opened since this is blocked by bug 256210
Matt Woodrow
Comment 5 2023-05-09 13:53:26 PDT
Pull request: https://github.com/WebKit/WebKit/pull/13653
EWS
Comment 6 2023-05-11 17:03:36 PDT
Committed 263993@main (d2f31696424a): <https://commits.webkit.org/263993@main> Reviewed commits have been landed. Closing PR #13653 and removing active labels.
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