Ah, it sounds like you are using it on all modules already installed on the machine. I'm only using it on a single distribution downloaded with cpanm --look which just downloads the raw module from cpan without installing it. So I have no blib directory. Yeah, I noticed the SHA256 in your code. I'm sure that's what makes it a bit slower. Not a big deal. I was just trying to figure out why mine was slower for you. Sounds like my code was probably slower for you because it was analyzing many files twice.