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From: john.mccabe@emrad.ns.com (John McCabe)
Newsgroups: comp.lang.ada
Subject: Re: comparing gnat/Ada95 and g77
Date: Thu, 14 Mar 2002 10:37:59 GMT
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Date: 2002-03-14T10:37:59+00:00
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On Thu, 14 Mar 2002 10:47:18 +0100, Reinert Korsnes
<reinert.korsnes@chello.no> wrote:

>Hi,
>
>Could anybody try these two programs (Ada and Fortran)
>and see if it is possible to make the Ada version (via compile 
>options) to run as fast as the Fortran version under Linux, gnat
>and g77 ?

What do you mean by "as fast as"? Do you have some figures already?
What are the differences?

I can't see any reason (other than constraint checking which can be
switched off) why the actual calculations should be any different, but
you might find that the IO takes longer in Ada than in Fortran because
it is obviously a bit more complicated (3 subroutine calls instead of
1) and, as you're doing this within a *huge* loop, any slight
degradation here will be significant.