[snek]

JS functions go back and forth because they're trying to provide optimized representation of functions based on guesses they make about the code. WASM plays an entirely different game. WASM bytecode is generally already extremely optimized (compiled with compiler -O flags, etc), the optimizations that a browsers apply are more about the machine the WASM running on (dealing with register allocation, simd instructions, etc). There is no guessing or opportunistic optimization like there is in JS.

[saagarjha]

There's still profile-guided optimization.