[Webkit-unassigned] [Bug 239488] REGRESSION(r292803) WinCairo GPU process significant performance drop

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=239488

--- Comment #4 from Fujii Hironori <Hironori.Fujii at sony.com> ---
If a page has a canvas element, WebPage::ensureRemoteRenderingBackendProxy creates m_remoteRenderingBackendProxy.

WebPage::finalizeRenderingUpdate calls m_remoteRenderingBackendProxy->finalizeRenderingUpdate() if m_remoteRenderingBackendProxy is available.

RemoteRenderingBackendProxy::finalizeRenderingUpdate sends a FinalizeRenderingUpdate stream message.

RemoteRenderingBackendProxy::streamConnection has 3 seconds tiemout.
This is causing the performance drop.

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