To be even more explicit: loop over rows in the innermost loop, not cols. You should get an improvement of around x6 (at least I do).
On Friday, July 1, 2016 at 7:26:20 PM UTC+2, Kristoffer Carlsson wrote: > > To be explicit, you are looping over things in the wrong order. You want t > he next loop iteration to access data that is close in memory to the > previous iteration. Right now you are making big jumps in memory between > each iteration.
