[Webkit-unassigned] [Bug 230766] Canvas drawImage is very slow when used with video as source

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=230766

Cameron McCormack (:heycam) <heycam at apple.com> changed:

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--- Comment #4 from Cameron McCormack (:heycam) <heycam at apple.com> ---
Thanks for the bug report.  Sam is right: this is because with GPU process canvas rendering enabled, we end up doing some copies of the HTMLVideoElement frame data (which lives in the GPU process) to share it (synchronously) to the Web process, only to ship it back to the GPU process again for the drawImage() call.  We should be able to avoid any of this copying.

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