Too Slow at initialization in Window chrome

[dongho-shin]

I'm raising this as an issue to see if anyone has found a workaround for the slow initialization on Windows Chrome. (I understand that performance issue can be solved WebGPU.)

I check the performance with profiler, getProgramInfoLog and getProgramParameter functions are taking up the most of time, which is explained in getProgramInfoLog performance issue.

[dongho-shin]

it seems to Window 10, chrome got KHR_pararell_shader_compile not supported. I think it's a key for this issue i'll dig it more
=> Actually in mac there's no difference between angle backend OPENGL(not supported), Default(supported)

[gkjohnson]

Yes unfortunately this is a known issue with Windows 10 and the direct x shader compiler. The pathtracing shader can take up to 30 seconds if I recall correctly - it compiles much more quickly on mac devices. Async compilation is the best solution for this as far as I know but unfortunately there's not much that can be done if the extension isn't supported. There are some issues in the chrome bug tracker like this one but I don't expect this will be fixed in Chrome / ANGLE / DirectX any time soon if ever.