does someone here, familiar with webassembly semantics, know if it’s theoretically possible to start streaming execution of code? I.e. as soon as the “main” (?)

does someone here, familiar with webassembly semantics, know if it’s theoretically possible to start streaming execution of code? I.e. as soon as the “main” (?) function is in, and block on every function call which is not yet compiled, recursively? Or could the last block of webassembly bytecode potentially change the semantics of the first? Sooner or later, that’s an avenue people will want to explore, I assume?