[jnordwick]

Wasm will turn into an optimizing jit. Or it will run slow or deliver massive binaries if it is the equivalent of statically linked. I don't really see a way around that.

Once it tries to start inlining on the client side, that will open the floodgates to other optimizations.

[richardwhiuk]

It could easily allow a different binary to be downloaded per client (e.g. sse3 capable, sse4 capable, avx capable, avx512 capable).

The compiler would then spit out eighteen different versions and the right one would be downloaded by the user.