[Webkit-unassigned] [Bug 274595] View Transition timing, performance and rendering quality with many shared elements (35+) is really bad

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=274595

--- Comment #6 from Callie Riggins <callie.riggins at airbnb.com> ---
Just tested with the latest build of Release 196 (Safari 17.4, WebKit 19619.1.16.3) that just got released and it's getting much better. The performance on the first invocation was a bit choppy but repeated ones I'm assuming when the image was cached in both directions was faster.

The main issue I see remaining is that on both the entry and exit animations some of the elements positioning during the animation is jumping dramatically. 

On the enter: The "Living Room" shared element jumps to the beginning, then jumps back to the right place, while the "Manage Photos" shared element that's a button has a scaling issue still.

On the exit: Much more pronounced here. Not sure if this is a layout issue but the entire grid of photos seems to be misaligned with the old/new captures. The old group scales down and out while the new comes in from the sources on the left, but the should all be connected. It creates a super strange distortion effect.

See attached video frame by frame to really see the crux of both sides.

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