Add feature: WebGPU subgroups

[captainbrosset]

Specification

This is new as of Chrome/Edge 134.

Description

The subgroups WbGPU feature allows SIMD parallelism. By using subgroups, threads within a group can perform collective operations. This provides efficient communication and data sharing among groups of invocations. These operations can be used to accelerate applications, by reducing memory overhead that's incurred by inter-invocation communication.

Documentation

• https://learn.microsoft.com/en-us/microsoft-edge/web-platform/release-notes/134#webgpu-subgroups
• https://chromestatus.com/feature/5126409856221184
• Add subgroups feature gpuweb/gpuweb#4963
• https://gpuweb.github.io/gpuweb/#subgroups

Browser support

Chrome/Edge 134

[captainbrosset]

Added a draft feature here: https://github.com/web-platform-dx/web-features/blob/main/features/draft/webgpu-subgroups.yml

If anyone knows about this feature and would like to convert this draft feature into a real one, that would be great!