http://rosettacode.org/wiki/Find_duplicate_files#PicoLisp
> https://git.envs.net/mpech/xxhash-picolisp > This binding I will use in this task: > http://rosettacode.org/wiki/Find_duplicate_files (mike) -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe