RE: [off-topic] Intel's C/C++ compiler ...

[Mikael Adlers <mikael at mathcore dot com>]

Hi,
there can be an great difference between compilers, for example
I got a speedup of 1.5 when switching from lcc to MS Visual C++
(sparse QR routine for matlab), so I think the article may be valid. 
However, they could have stated what compiler flags they where using!
It is hard to good benchmarking.

The only thing Intel can compete with in regard to MS Visual C++
(with MFC and other stuff) and gcc (free) is to produce good code.
Otherwise why should anyone buy it (except that is follows the C++ 
standard better then Visual C++)?

I made a quick search on the web and found related stuff;

"My preliminary results: Intel-generated code is 20% faster than what I got
from g++."
from http://www.coyotegulch.com/hpc/intel_1st_look.html

"* Will give a decent performance boost over Visual C++ " (refers to Intel C
5.0)
from http://www.oonumerics.org/oon/oon-list/archive/0073.html

"The other commercial compiler, Microsoft, is certainly respectable,
typically losing out 
to Intel by only 11-13% (except for that P4 LAME result) in run-time speed"
from http://www.willus.com/ccomp_benchmark.shtml?p11

Regards,
/Mikael Adlers

------------------------------------------------------------------ 
 Mikael Adlers, Ph.D.          email: mikael@mathcore.com 
 MathCore AB                   phone: +4613 32 85 07 
 Wallenbergsgata 4             fax:         21 27 01
 SE-583 35 Linköping, Sweden   http://www.mathcore.com



> -----Original Message-----
> From: Brian Gough [mailto:bjg@network-theory.co.uk] 
> Sent: den 31 januari 2002 21:59
> To: Jose Miguel Buenaposada Biencinto
> Cc: gsl-discuss@sources.redhat.com
> Subject: Re: [off-topic] Intel's C/C++ compiler ...
> 
> 
> Jose Miguel Buenaposada Biencinto writes:
>  > Maybe this is interesting to someone, the Intel's compiler produces
>  > code 47% faster than gcc code on Intel processors and 20% faster on
>  > Athlon processors (all on GNU/Linux):
>  > 
>  > http://www.e-open.ws/features/Vol_15/IntelC/intelc.htm
>  > 
> 
> Surely this article is some kind of joke. 
> 
> 
> 
>