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From: jonathan <johnscpg@googlemail.com>
Newsgroups: comp.lang.ada
Subject: Re: Making measurements (Was: compiler settings in AdaGIDE)
Date: Mon, 26 Jul 2010 02:57:48 -0700 (PDT)
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Date: 2010-07-26T02:57:48-07:00
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On Jul 26, 9:02=A0am, Jacob Sparre Andersen <ja...@jacob-sparre.dk>
wrote:
> Jonathan <johns...@googlemail.com> wrote:
> > =A0 =A02010 GNAT GPL:
> > =A0 =A0gnatmake bench.adb -gnatnp -O2 -march=3Dnative -ffast-math -funr=
oll-
> > loops
> > =A0 =A03.61 seconds
>
> I hope this is a average or median value from several measurements.
>
> Which of the two? =A0Did you estimate the uncertaincy of your
> measurements?
>
> Jacob
> --
> Jacob Sparre Andersen Research & Innovation
> Vesterbrogade 148K, 1. th.
> 1620 K=F8benhavn V
> Danmark
>
> Phone: =A0 =A0+45 21 49 08 04
> E-mail: =A0 ja...@jacob-sparre.dk
> Web-sted:http://www.jacob-sparre.dk/

I did a few runs with the linux: time ./bench
on an empty machine and got numbers like this:

  0m3.612s  0m3.604s  0m3.620s  0m3.612s  0m3.620s  0m3.604s

Some programs fluctuate hugely in running time .. never
figured out why.

J.