Revert "file/md5: faster"
Revert "file/md5: faster"

This reverts commit cbc1637e56295e2769bd3a599831cff670584fd6.

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket