[Webkit-unassigned] [Bug 256088] New: Some Unity shaders slower on Metal than on OpenGL

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=256088

            Bug ID: 256088
           Summary: Some Unity shaders slower on Metal than on OpenGL
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: ANGLE
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: kkinnunen at apple.com
                CC: dino at apple.com, kbr at google.com, kkinnunen at apple.com
            Blocks: 255987

See for example on bug 255987

On OpenGL, fullscreen Studio display 5120x2880 runs full rate, 60 fps.

On Metal, fullscreen Studio display 5120x2880 runs 32 fps.

Resizing the app to smaller window increases the frame rate.

Disabling the shaders in Web Inspector increases the frame rate.


Referenced Bugs:

https://bugs.webkit.org/show_bug.cgi?id=255987
[Bug 255987] REGRESSION (iOS 15.4): Poor game render performance with "WebGL via Metal"
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