Been working on a single-pass WebAssembly JIT compiler (atm only guaranteed to work on M1 air), been super interesting learning and thinking through strategies to balance fast compilation & fast generated code. It's the fastest single-pass JIT output-wise that I'm aware of, but the compilation speed could use some work.
Also: the README is pretty outdated, the real interesting stuff happens in https://github.com/csjh/mitey-jit/blob/main/backend/arm64/ba...
https://github.com/csjh/mitey-jit