X-pop3-spooler:	POP3MAIL 2.1.0 b 3 961213 -bs-
Delivered-To:	pcg AT goof DOT com
Date:	Thu, 26 Mar 1998 14:14:52 -0300
From:	JORGE HERNANDO <hernando AT cnea DOT edu DOT ar>
Message-Id:	<199803261714.OAA23356@cnea.edu.ar>
To:	beastium-list AT Desk DOT nl
Subject:	pg77 speed
Sender:	Marc Lehmann <pcg AT goof DOT com>
Status:	RO
X-Status:	A
Lines:	29

         Krzysztof Strasburger  wrote

>>> 2) Did you get the 40% improvement on another programs?

>>We do MD simulations here with AMBER. I observed speed improvements of only
>>some percents (maybe ~5% maximum) compared with g77 0.5.21.
>The optimization efficiency is very code-dependent. I have my own program,
>which runs with only small speed difference between pgcc and gcc-2.7.2.3
>(heavy floating point calculations).
>When I compiled GAMESS (quantum chemistry), I found a critical subroutine.
>It ran almost 3x faster with pgcc than with gcc-2.7.2.3 on PPro.
>The recompilation gave 25-250% speedup of GAMESS (task dependent).
 

 Yes, I know that the improvements are code-dependent, that was the 
reason for my question, to have some sampling of results.
But the question I have now is different but along the same line:
I'm assuming that libc and libm will also benefit from the 
optimization provided for pgcc, so my question:  does anybody have 
a ready to install libc compiled with pgcc ? If such a thing exists,
it would be very convenient to have it in some public ftp site (the
pgcc site?).

and thanks a lot to all the people who gave me the address where to look
for installing instructions for libc 
           
J. Hernando
Physics Dept., CNEA
hernando AT cnea DOT edu DOT ar

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