Dev/perf testing

[mattleibow]

This is a PR to investigate the crazy perf difference found here: https://github.com/wieslawsoltes/FastSkiaSharp

Discussion thread: https://x.com/wieslawsoltes/status/1984761177520685154

The native code is 120fps, but skiasharp is sub 10fps.

By first playing around found that I got to 40fps by using the new opengl flags in the SKGLView.

This all appears to be inside the skia code, which appears to be using similar compiler args.

My fork which downgrades skia to the same version in skiasharp is a tiny bit slower, 111-119 fps: https://github.com/mattleibow/FastSkiaSharp/tree/main_119

So the newer skia is faster, but only a bit. There is still a significant difference between teh code in the c++ and the C#

[github-actions]

Triage Summary

No labels will be applied due to a lack of specific context or content related to performance testing and other relevant areas.

This issue is not a regression, as there are no specifics to suggest that previous functionalities are failing.

Additional remarks:

• The issue lacks explicit details about performance problems, backend relations, or affected operating systems, making it challenging to categorize appropriately.

Detailed Summary and Actions

Summary of the triage:

• No labels can be applied as the issue does not specify any affected platforms or areas such as documentation or SkiaSharp.
• The discussion is about performance testing but lacks specific performance-related details or results.
• There are no indications of reliability or compatibility issues, leading to the conclusion that relevant labels cannot be assigned.

Summary of the actions that will be performed:

Action	Item	Description
No Action	-	No labels were applied due to insufficient details present.

This entire triage process was automated by AI and mistakes may have been made. Please let us know so we can continue to improve.

[ajitid]

Were we able to find out what is causing this perf difference? If yes, is it fixable?

[mattleibow]

Closing this in favor of #3546 which addresses the root cause identified in #3525 — macOS SKGLView reads stencil bits incorrectly, disabling Skia's fast TessellationPathRenderer. The real fix is a one-line change that yields a 15.6× speedup.