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Ok, found out more about loop unrolling on:

http://en.wikipedia.org/wiki/Loop_unrolling

Is it enough? Is it the thing you said I could do (in the deep-most for to compute several steps ahead)?...

Yes, my concern is why the order of the loops makes any difference. I don't know anything about "unrolling loops" (or maybe I do but I don't know it's called like that, could you please explain me a...

Hello!

I searched the forum on this topic. My problem is as follows: I wrote a C++ algorithm which involved segment trees and matrix product. I had a timelimit of 1.1 seconds.

In the "matrix...