Re: Optimization questions
Re: Optimization questions
- Subject: Re: Optimization questions
- From: Eric Albert <email@hidden>
- Date: Mon, 27 Nov 2006 08:05:14 -0800
It doesn't. Those are generally the same architecture underneath
(cache sizes and a few other things are different, but a lot is the
same), so gcc treats them the same today.
-Eric
On Nov 27, 2006, at 5:13 AM, Niels Meersschaert wrote:
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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