[Webkit-unassigned] [Bug 277603] Poor video texture upload performance

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=277603

--- Comment #3 from Jake Archibald <jaffathecake at gmail.com> ---
I'm seeing this on a 14" 2021 MacBook Pro (M1).

https://photos.app.goo.gl/HMqdUfUDu5sfcP199 - you'll need to download the original video to see it in 60fps.

I measured it visually. The amount of frame drops seems to vary. When I took the video above, it was better than I was seeing it yesterday, but it's still dropping frames.

Safari's timeline suggests everything's fine, and rAF is firing at 60fps. It seems like the same frame is being pulled from the video on multiple frames, when it should be different.

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