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From: Jacob Sparre Andersen <sparre@nbi.dk>
Newsgroups: comp.lang.ada
Subject: Re: What is faster Ada or C?
Date: Fri, 07 Dec 2001 18:10:23 +0100
Organization: Centre for Chaos and Turbulence Studies, Niels Bohr Institute
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Date: 2001-12-07T18:10:23+01:00
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Georg Bauhaus wrote:

> Jacob Sparre Andersen <sparre@nbi.dk> wrote:
> 
> : * Why are the two programs below not equivalent?
> : * How can I get the Ada program to run as fast as the C++
> : program?
> 
> : with Ada.Numerics.Generic_Elementary_Functions;
> : #include <math.h>
> 
> do the two sqrts in effect refer to the same routines?

I can not see why they shouldn't.

> :   Ada.Text_IO.Put_Line ("X = " & Scalar'Image (X));
> 
> :   cout << x << endl;
> 
> have you tried with redirection to a null device,
> or with no output? (terminal I/O might really slow thing
> down.)

I have tried with 100_000_000 iterations, and found about
ten times as long execution times, as with 10_000_000
iterations.

Jacob
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