Re: IOS floating point performance
Re: IOS floating point performance
- Subject: Re: IOS floating point performance
- From: Rick Mann <email@hidden>
- Date: Wed, 07 Aug 2013 14:38:11 -0700
On Aug 7, 2013, at 14:34 , Trygve Inda <email@hidden> 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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