[bee_rider]

Hmm. Do we expect X on Y to have run times more like X*Y or max(X,Y)? Or maybe some more complicated combination because you have to pay both their overheads but then once things start cranking you are just paying the per-element cost of one of the languages…

[yupyupyups]

I'm not an expert. I speculate that the compiler is unlikely to optimize the wasm binary better than an x86 binary. Furthermore, every VM instruction is on average going to need more than 1 cpu instructions to be executed. Intuitively, that would suggest slower execution. That is also what we see happen in practice with VMs.

Python is not a particularly fast language in the first place due to bad utilization of memory, hash table lookups everywhere and a high function call overhead.