[mr_toad]

The language has nothing to do with it.

You can use “WASM threads” from Rust or Go. Or JavaScript for that matter. Under the hood it’s all workers and shared array buffer, nothing to do with the language. Last time I checked you can’t even use std::thread for instance in Rust, since the compiler doesn’t understand workers (because workers aren’t actually part of WASM).

None of which will help you when updating the DOM anyway, since that happens in its own thread. It’s up to the browser how they run their rendering engine and I doubt they’re ever likely to allow direct control over that.