[Webkit-unassigned] [Bug 255987] REGRESSION (iOS 15.4): Poor game render performance with "WebGL via Metal"

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=255987

--- Comment #4 from Kenneth Russell <kbr at google.com> ---
I can see a performance difference running in Chromium also: ~105 FPS on ANGLE/Metal and ~120 FPS on ANGLE/OpenGL.

A profile of Chromium's GPU process shows a lot of time spent in waiting for the backpressure fence. If similar behavior's seen on WebKit then this might be a duplicate of Bug 254912.

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