I actually tried doing this a couple weeks ago. Rust on Cloudflare Workers. It didn't go well -- compiling to wasm disables a lot of Rust features, to the point where it just didn't make sense anymore. I gave up after trying to get some crypto stuff working. I eventually switched to using raw JS because Cloudflare Workers exposes the Web Crypto API, but next time I want to run Rust serverlessly, I'm just going to put it on Lambda, compiled to a regular binary.
