Vanity SSH keys at 300M/s on OpenCL

A few years ago I published vanity-keygen , a small Go program that brute-forces ed25519 SSH keypairs until the public key matches a regex. It did about 250k keys per second on my 32-core machine: a minute for love$ , days for [pP][cC][aA][rR][rR][iI1][eE][rR] . This week an LLM rewrote it from scratch in Rust, with all of the cryptography hand-rolled in a single OpenCL kernel. I provided…