Hey Look, This isn't a Language Shitpost

Hello /proggles/. In the midst of all of this "faggotry," I propose a thread about actual programming.

Suppose you have a sort of root directory with a large number of subdirectories all containing a large number of files. The files all exist in ranges of size from a few kilobytes to several gigabytes. Given an input file, let's conduct a quick method for searching our root directory and its subdirectories for copies of the input file.

I've thought of a fairly decent algorithm that I will share if anyone here is interested enough to share their own.

A brute force method is easy. You could check the one file against each other file sequentially.