[Webkit-unassigned] [Bug 276959] powerPreference "high-performance" causes bad performance

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=276959

--- Comment #5 from Kimmo Kinnunen <kkinnunen at apple.com> ---
Thank you for the report. I can confirm the slowdown.

It's likely that threejs selects different rendering algorithm based on the power preference.

On desktop macOS Apple Silicon based devices, you can see that the high-performance case uses anisotropic texture filtering extension. The renderer, default options, uses half float extensions while high-performance does not.

Please consult threejs docs and code to see if this is the case. If this is as expected, please report back and we can close this bug.

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