This repo contains a dumb script md5sumsum which compute the md5sum
of the concatenation of all md5sum of all files of a folder hierarchy
with paths sorted in alphabetical order.
This script is useless (you would for sure prefer do that with tar and
have in bonus the file metadata) and have no other purpose than to be an
exercise to learn what commonly makes a software slow and how to speed
up it.
That's why we have here an automated test suite (thanks to Travis CI) that measures the speed of execution of submitted PRs!