Any thoughts about using SwiftShader as the software renderer?

[kaiwk]

Can we use swiftshader as the software renderer, looks like it has better performance? See #4211 and swiftshader. I'm not sure whether swgl can works well with video playing.

[kvark]

I'm not directly involved in SWGL, but my understanding is that it's working very well, and it's far along. At this point, we'll rather focus on shipping it everywhere it needs to be, than evaluating swiftshader.

[nical]

Swift shader (and llvmpipe and the likes) are designed/optimized to do as good a job as they can on typical 3d rendering workloads. swgl on the other hand, works in a very peculiar way which wouldn't do a great job at rendering a 3d game but is optimized for the types of primitives that WebRender produces most, (loads of non-rotated axis-aligned rectangles) with very webrender-specific fast paths for the most common primitives. Video playback is typically the type of things that swgl is better equipped to handle than a general purpose software GL implementation.