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From: Martin Dowie <martin.dowie@btopenworld.com>
Newsgroups: comp.lang.ada
Subject: Re: Request for comments on simple Ada program
Date: Wed, 16 Nov 2005 18:05:57 +0000 (UTC)
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Date: 2005-11-16T18:05:57+00:00
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jimmaureenrogers@worldnet.att.net wrote:
> My timings were done on a similar program which can be found at
> http://shootout.alioth.debian.org/benchmark.php?test=nsieve&lang=gnat&id=0
> 
> My home system has an AMD 64 3400+ processor with 512 Mb L2 cache.
> I ran my tests using Win XP Service Pack 1.
> 
> The program takes input from the command line and calculates 3
> different values of Upper. It simply reports the number of primes
> calculated during the run. The output for a command line value
> of '9' is:
> 
> PROGRAM OUTPUT
> ==============
> Primes up to  5120000   356244
> Primes up to  2560000   187134
> Primes up to  1280000    98610
> 
> Jim Rogers

Have you tried running with "-O2" instead of "-O3"? Apparently, "-O3" 
can cause some seemingly "perverse" effects.

Cheers

-- Martin