On Aug 7, 2013, at 14:34 , Trygve Inda <[email protected]> wrote:

> I am currently doing it on an NSThread. I may try replacing all the doubles
> with floats in the algorithm and see how that goes (on a backup of course!).

Yes, floats should help (unless precision errors make it worse). You'll be 
moving a lot less memory around, and they're computed in hardware (I think 
double requires software intervention, but I could be wrong about that).

> How do I set optimization on a per-file basis?

In the Target settings, Build Phases tab, Compile Sources phase, you can set 
individual compiler flags. I put -O3 on each of the files I want optimized. -O2 
or -Os should be tried, too, to see which gives you the best results.


-- 
Rick




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