Made the requested benchmark:

https://theultdev.github.io/web-sha256-benchmark

https://github.com/TheUltDev/web-sha256-benchmark

It's Chrome wasm (windows) that is slow for me, 2x slower than asmjs.

FF with asmjs optimizations are 2x slower than wasm on FF.

Wasm in FF is 2x faster than wasm in Chrome for this hashing solution (for me).