[Webkit-unassigned] [Bug 232235] New: REGRESSION(Safari 15, BigSur): Poor video texture upload performance with MacBook M1, ANGLE OpenGL backend

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=232235

            Bug ID: 232235
           Summary: REGRESSION(Safari 15, BigSur): Poor video texture
                    upload performance with MacBook M1, ANGLE OpenGL
                    backend
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore JavaScript
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: kkinnunen at apple.com
                CC: dustin.kerstein at gmail.com

REGRESSION(Safari 15) Poor video texture upload performance with MacBook M1, ANGLE OpenGL backend

Affects potentially Safari down levels (Safari 15 on Big Sur)

> Dustin Kerstein dustin.kerstein at gmail.com
> https://jsfiddle.net/qz9ka6xm (using RGBA textures from a very simple cycling color video).

WebKit trunk, MacBook M1, measured on macOS Monterey for simplicity

                     1080p.   2160p
ANGLE Metal            ~2ms    ~2ms
ANGLE OpenGL (CGL)    ~30ms  ~250ms

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