Parallelizing rustc using Rayon

My plan for parallelizing rustc basically is to allow use of Rayon anywhere in the compiler. If you’re unfamiliar with Rayon or need a refresher, I suggest you read http://smallcultfollowing.com/babysteps/blog/2015/12/18/rayon-data-parallelism-in-rust/. There are a number of loops in rustc which just iterates over all items in a crate and these should use Rayon iterators instead. Parallelizing the

[tanakh]

こういうのもあるのか(´･_･`)