Documentation for wasm32-wasi support?

[saona-raimundo]

Hi! Thank you for all the work.

I wanted to ask for documentation to use rayon in wasm32-wasi target, like running a wasm module with wasmtime.

I have seen documentation for the web like the current link in the readme and others:

• wasm-bindgen-rayon
• wasm-bindgen Parallel Raytracing

Some issues that are related are #93 and the PR #636.

Maybe I did not read carefully enough but my goal is to:

• Write a Rust program using rayon
• Compile it to wasm32-wasi
• Run it with wasmtime

If I naively do just this I get the known thread pool not initialized error.

(Maybe I should also ask in wasmtime?)

[cuviper]

IMO, it would be better to improve the documentation in one of the wasm-specific repositories, especially since the mechanism is currently experimental and may change as the wasm standard evolves.