1.4.1 is adding 20kb to wasm binaries size

[NikVolf]

compared to 1.4.0

[NikVolf]

probably due to this:

https://github.com/debris/tiny-keccak/pull/22/files#diff-b4aea3e418ccdb71239b96952d9cddb6R72

@Vurich :)

[newpavlov]

Take a look at sha3 crate, it does not unroll outermost loop, which significantly reduces binary size and even improves performance a bit.

UPD: also by enabling no_unroll feature on keccak crate you'll get even smaller binary size at the expense of some performance loss.

[eira-fransham]

Thanks for tagging me in this. I meant to do this a while ago (the author of sha3 put in a PR to link to their code so I had a look at it and noticed that they'd rerolled the outer loop) but then just, um, didn't. On it now.

[eira-fransham]

Another thing that makes explicit loop unrolling a bit of a deal with the devil is that LLVM doesn't seem to autovectorise unrolled loop code, only "real" loops. LLVM's autovectorisation isn't perfect but until we get simd on stable it's the best we have.

[debris]

fixed in #30