Re: IOS floating point performance
Re: IOS floating point performance
- Subject: Re: IOS floating point performance
- From: Trygve Inda <email@hidden>
- Date: Wed, 07 Aug 2013 14:34:48 -0700
- Thread-topic: IOS floating point performance
> A few things:
>
> - The little ARM in the iPad 3 is nothing compared to your desktop. Not only
> is it not as fast, it doesn't have the memory bandwidth. Also, an iPad 4 will
> be twice as fast.
> - make sure you're running optimized code. You can set optimization flags on
> individual files (that's what I do in our compute-heavy code, so I can run
> debug releases for the UI but leave the computation optimized).
> - Find a way to compute less. Algorithmic optimizations are key here. Maybe a
> larger step size?
> - Can you break up the work into multiple tasks? That will allow you to
> parallelize the work. At the very least, make sure you're doing it on a
> separate dispatch queue/NSOperationQueue so it doesn't block your main UI.
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!).
How do I set optimization on a per-file basis?
Trygve
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