N-body bench

[bearophile]

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