From: gautier_niouzes@hotmail.com (Gautier)
Subject: Re: comparing gnat/Ada95 and g77
Date: 16 Mar 2002 06:00:00 -0800
Date: 2002-03-16T14:00:01+00:00 [thread overview]
Message-ID: <17cd177c.0203160600.6878b267@posting.google.com> (raw)
In-Reply-To: a6sjb3$em8$1@snipp.uninett.no
Reinert Korsnes:
> For the Ada95 program I used:
>
> gnatmake test1.adb -cargs -O3 -ffast-math
Hello!
* To compare Ada with Fortran, you should also suppress all checks,
i.e. for GNAT: -gnatp . At least with Compaq Ada where I did compare,
the Suppress_All pragma brought the perfomance near to the F77 one
(a few percents off)
* The automatic inlining is often counter-productive, so I would
use -O2 rather than -O3, but enable the cross-unit inlining,
i.e. -gnatn .
HTH
________________________________________________________
Gautier -- http://www.mysunrise.ch/users/gdm/gsoft.htm
NB: For a direct answer, address on the Web site!
next prev parent reply other threads:[~2002-03-16 14:00 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-14 9:47 comparing gnat/Ada95 and g77 Reinert Korsnes
2002-03-14 10:37 ` John McCabe
2002-03-14 11:00 ` Preben Randhol
2002-03-15 10:44 ` Reinert Korsnes
2002-03-15 12:14 ` John McCabe
2002-03-15 17:53 ` Georg Bauhaus
2002-03-16 14:00 ` Gautier [this message]
2002-03-14 10:58 ` Martin Dowie
2002-03-14 11:04 ` chris.danx
2002-03-14 11:07 ` Bobby D. Bryant
2002-03-14 11:41 ` David C. Hoos, Sr.
2002-03-14 11:06 ` Preben Randhol
2002-03-14 16:43 ` Jeffrey Carter
2002-03-14 11:14 ` Gerald Kasner
2002-03-14 12:59 ` Gary Scott
2002-03-14 13:17 ` Jean-Marc Bourguet
2002-03-15 0:52 ` Gary Scott
2002-03-14 16:19 ` Dan Andreatta
2002-03-15 9:35 ` Gerald Kasner
2002-03-14 17:31 ` Toshitaka Kumano
2002-03-14 16:40 ` Jeffrey Carter
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