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Subject: Re: ot. is the gcc 3.3 compiler just as fast as microsoft's now?? nt.

Author: Robert Hyatt

Date: 18:11:39 08/06/03

Go up one level in this thread


On August 06, 2003 at 07:04:06, Alejandro Dubrovsky wrote:

>On August 05, 2003 at 14:16:18, Robert Hyatt wrote:
>
>>On August 05, 2003 at 13:02:50, Albert Silver wrote:
>>
>>>On August 05, 2003 at 11:15:41, Robert Hyatt wrote:
>>>
>>>>On August 05, 2003 at 10:45:41, Ricardo Gibert wrote:
>>>>
>>>>>On August 05, 2003 at 09:53:26, Robert Hyatt wrote:
>>
>>
>>
>>For me, using an intel xeon processor, gcc is 20-25% behind MSVC.  The Intel
>>compiler is less than 10% slower for me.  I can't give numbers for AMD
>>processors.
>
>Yes, i have read from one of the gcc developers that the P4 should be the
>comparatively worst processor for gcc compared to the rest of the compilers
>because they don't do proper instruction scheduling.  he blamed this on intel
>docs.  So what kind of Xeon was this?  P3 or P4 based?
>
>alejandro


PIII and PIV.  My quad 700 was a PIII.  My dual 2.8 is a PIV xeon.

icc is faster for both.  It has been since version 6.0 came out.  7.0
is not really any faster that I can tell.

Note that this is with profile-guided optimizations.



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