I found a way to speed up the brute force attack method, drop the hash160 conversion to address, because that conversion requires a SHA-256D, that is equal as mining bitcoin, now if we skip that part, what percentage can we gain in speed increase?
True. It's how Brainflayer and keyhunt in RMD160 mode work. Much much faster and results in the same output eventually. I wish bitcrack would update to rmd mode. Might double speed.