X-pop3-spooler:	POP3MAIL 2.1.0 b 3 961213 -bs-
Delivered-To:	pcg AT goof DOT com
Message-Id:	<m0yI9zc-0001zaC@chkw386.ch.pwr.wroc.pl>
Date:	Thu, 26 Mar 98 10:34
From:	strasbur AT chkw386 DOT ch DOT pwr DOT wroc DOT pl (Krzysztof Strasburger)
To:	Hannes DOT Loeffler AT uibk DOT ac DOT at, hernando AT cnea DOT edu DOT ar
Subject:	Re: pg77 speed
Cc:	beastium-list AT Desk DOT nl
Sender:	Marc Lehmann <pcg AT goof DOT com>
Status:	RO
Lines:	11

>> 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).
Krzysztof Strasburger

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