Re: Xcode 5.1 compiler option -Ofast
Re: Xcode 5.1 compiler option -Ofast
- Subject: Re: Xcode 5.1 compiler option -Ofast
- From: Alex Zavatone <email@hidden>
- Date: Tue, 18 Mar 2014 00:31:25 -0400
Thanks all for the feedback. I'll have fun browsing the videos tomorrow.
On Mar 18, 2014, at 12:16 AM, Chris Lattner wrote:
>
> On Mar 14, 2014, at 11:41 AM, Alex Zavatone <email@hidden> wrote:
>
>> Just noticed the new compiler option in Xcode 5.1 called Fastest, Aggressive Optimization.
>>
>> I didn't see any info on this in the What's New in Xcode docs. Is there any handy reference for this new feature?
>
> Hi Alex,
>
> This option was new in Xcode 5, it isn't new in 5.1. -Ofast is equivalent to turning on -ffast-math (which favors performance over strict IEEE numerics) and -fstrict-aliasing as well as increasing code size. One of the advanced LLVM talks at WWDC 2013 should have discussed it.
>
> -Chris
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