Stanislav Blinov:
I meant that if I unroll it, it's not irrelevant anymore :)
If a function takes no time to run, and you tweak it, your program is not supposed to go faster.
I was going to compare the asm listings, but C++ seems to have unrolled and inlined the outer loop right inside main(), and now I'm slightly lost in it :)
Try using -fkeep-inline-functions. Bye, bearophile
