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Re: Optimization questions
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Re: Optimization questions


  • Subject: Re: Optimization questions
  • From: Niels Meersschaert <email@hidden>
  • Date: Mon, 27 Nov 2006 08:13:19 -0500

Eric,

Does the scheduling have any impact when run on a system using the Xeon chips (a.k.a Mac Pro & Xserve) vs the Core chips (iMac, mini, MacBook)?

Niels

On Nov 23, 2006, at 12:09 AM, Eric Albert wrote:

On Nov 22, 2006, at 11:50 AM, Blair M. Burtan wrote:

If you don't care about code size (because you have tons of RAM anyway) is
it better to use Fastest or Fastest, Smallest? Which produces faster code?

I'll second what Mark said -- profile your code and go with what's best. In general we've found that smaller code is faster, but when you're very concerned with performance across the entire application it's always best to run tests and measure things carefully.


Also, should you be using instruction scheduling for a Universal Binary even
though there aren't any choices that pertain to Intel processors?

The default scheduling we use when compiling for Intel is optimal for both Core and Core 2 systems, so you don't have to change anything here.


Hope this helps,
Eric


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  • Follow-Ups:
    • Re: Optimization questions
      • From: Eric Albert <email@hidden>
    • Re: Optimization questions
      • From: "Sean McBride" <email@hidden>
References: 
 >Optimization questions (From: "Blair M. Burtan" <email@hidden>)
 >Re: Optimization questions (From: Eric Albert <email@hidden>)

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