[amelius]

This makes me wonder: does WASM allow a JIT (specializer)? I.e., does WASM allow self-modifying code or code to write code?

If not, then JIT'ed JS could still be faster than WASM.

[steveklabnik]

Wasm code is normally JIT-ed by the JS VM. That is, browser implementations don’t have an entire separate VM for wasm.