Great work and nice write up, Ash!

A suggestion: in the comparison table under the “AES and Port-Parallelism Recipe” it would be great to include “streaming support” and “stable output” (across os/arch) as a column.

Also something to beware of, some hash libraries claim to support streaming via the Hasher interface but actually return different results in streaming and one-shot mode (and have different performance profiles). I’m on mobile so I can’t check atm but I’m about 80% sure gxhash has at least one of these problems that prevented me from using it before.