Publishing here first time, I made this lib Gealber/zig-base58 which is a port of the firedancer(fd_base58.c) implementation that uses SIMD instructions. Has better performance than the one in Syndica/base58-zig which is used in Syndica/sig(Solana validator written in Zig).
In case you want to give it a try.
PS: Vectors in Zig are amazing