On: Comparing k-NN in Rust

[thinkpad20]

And here's one that runs in half that time (or possibly less if you have a lot of cores)[1]. Speedups due to suggestions in this thread[2].

EDIT: now runs in parallel and is faster than the Rust single-threaded version, and on par with the parallel Rust version, but only ~35 lines.

[1] http://lpaste.net/105456

[2] http://www.reddit.com/r/haskell/comments/27tcvz/knearest_nei...