If you want to try an optimized AVX-512 implementation of KangarooTwelve on the command line, you can `cargo install k12sum`. On my machine it's neck-and-neck with `b3sum --no-mmap` (which does not use threads).

Edit: Oh it looks like another option, `KeccakSum`, was released a couple months ago? https://github.com/XKCP/K12/commit/5271b58c990c1ac33c1097b4e...