Mystical mentions that Intel's compiler uses loop interchange to gain an extraordinary speedup. There's actually a great answer further down the page that detai

Mystical mentions that Intel's compiler uses loop interchange to gain an extraordinary speedup. There's actually a great answer further down the page that details this and was great as I wasn't aware of how it worked: http://stackoverflow.com/a/11303693/300908 http://stackoverflow.com/a/11303693/300908