https://github.com/mleku/nodl/tree/master/cmd/vainstr

this is the fastest vanity miner but you have to build and install the bitcoin secp256k1 library to get that benefit (and go)

it lets you search for prefixes, suffixes and anywhere in the key string

it can mine a 5 character suffix key in about 10 minutes on a 12 core Ryzen 5

i'd build a binary if someone would pay me to *wink*