Sorry if this seems like a dumb question. But wouldn't it be more effective and much more performant to use an ASIC miner for the computational tasks of VanitySearch instead of a modern GPU? My GPU does 1,750 MKeys/sec and in comparison to that a GekkoScience Compac F USBminer does about 300 GHashes per second. Is there possibly a VanitySearch version that uses such a Compac F for the calculation and thus works much faster, any clues ?
It's not fair to compare MKeys/sec to GH/s.
Those Bitcoin ASICs are specialized for SHA256d and the performance is based mostly from that task.
VanitySearch on the other hand, needs more than that, it have to compute the public key from the private key.
It also need to derive the address which requires another hashing algorithm RIPEMD160, and Bech32/Base58 for encoding which isn't something a SHA256 ASIC miner can calculate efficiently.
It may be able to work using a well-written software but the performance would be as fast as computing SHA256 twice.