.NET WebAssembly support of task based parallelism.

[RChrisCoble]

Is it in the roadmap for Blazor to support .Net's task based parallelism with WASM threads in .Net 5 or 6?

For instance, Chrome released WASM threads support in version 70. (I'm running version 84), so it's been out for some time. I'm not looking for async/await, I'm looking for maximizing the core usage through Task().

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[danroth27]

I believe the main limitation here is browser support for threads. While Chromium based browsers and Firefox I believe now have threading support on desktop, I believe Safari still doesn't and most mobile browser also still don't: https://caniuse.com/?search=sharedarraybuffer.

@lewing Can you confirm?

[RChrisCoble]

The Uno team seems to be messing around in this space already.

https://platform.uno/blog/webassembly-threading-in-net/

https://emscripten.org/docs/porting/pthreads.html

[danroth27]

@RChrisCoble Yup, that's all based on the work we've done in the .NET WebAssembly runtime to support threads. It just has limited browser applicability currently.

[RChrisCoble]

@danroth27 thanks for the reply. So to put a fine point on the current status of task based parallelism using browser thread support: (cc'ing @lewing )

1. The combined .Net 5/Blazor release will not support WASM task based parallelism, and everything will continue to run single threaded like the current Blazor bits (and JS).
2. There is work in flight to support WASM task based parallelism in the .Net core runtime. Does this have a release vehicle? .Net 6?
3. Even with the support of Get core-setup building in the consolidated repo. #2 above, it will only work in browsers that support threads.