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From: gautier_niouzes@hotmail.com (Gautier)
Newsgroups: comp.lang.ada
Subject: Re: comparing gnat/Ada95 and g77
Date: 16 Mar 2002 06:00:00 -0800
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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

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