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From: Robert Dewar <robert_dewar@my-deja.com>
Subject: Re: Apex vs GNAT on solaris
Date: 1999/12/08
Date: 1999-12-08T00:00:00+00:00	[thread overview]
Message-ID: <82kuc0$ji0$1@nnrp1.deja.com> (raw)
In-Reply-To: 82j35q$9281@news.cis.okstate.edu

In article <82j35q$9281@news.cis.okstate.edu>,
  dstarner98@aasaa.ofe.org wrote:
> Yes. GCC defaults to fast compilation. If you want good code,
> turn optimization on. It's definetly not fair to benchmark
                                           ^^^^

The issue is not so much fairness, as meaningfulness of the
results. When people publish comparative timings, you sort
of assume that the subtext is:

"look and see which compiler is faster"

But if you don't take care to make the figures meaningful,
the true subtext is something like:

"here are some random non-comparable figures from which nothing
 can be usefully deduced"

> GNAT at -O0 (the default) unless you're timing the compiler
> itself.


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  reply	other threads:[~1999-12-08  0:00 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
1999-12-07  0:00 Apex vs GNAT on solaris reason67
1999-12-07  0:00 ` reason67
1999-12-07  0:00 ` reason67
1999-12-07  0:00 ` reason67
1999-12-07  0:00   ` Robert Dewar
1999-12-07  0:00     ` reason67
1999-12-07  0:00 ` reason67
1999-12-07  0:00   ` Robert Dewar
1999-12-07  0:00     ` reason67
1999-12-08  0:00       ` Robert Dewar
1999-12-08  0:00         ` reason67
1999-12-07  0:00     ` Vladimir Olensky
1999-12-07  0:00       ` Vladimir Olensky
1999-12-09  0:00       ` Geoff Bull
1999-12-09  0:00         ` Vladimir Olensky
1999-12-09  0:00         ` Vladimir Olensky
1999-12-10  0:00           ` Vladimir Olensky
1999-12-07  0:00 ` reason67
1999-12-07  0:00 ` reason67
1999-12-07  0:00 ` reason67
1999-12-07  0:00 ` Robert Dewar
1999-12-07  0:00   ` reason67
1999-12-08  0:00     ` Robert Dewar
1999-12-08  0:00       ` reason67
1999-12-08  0:00         ` Robert A Duff
1999-12-08  0:00         ` Robert Dewar
1999-12-08  0:00         ` Larry Kilgallen
1999-12-07  0:00   ` Roger Racine
1999-12-07  0:00     ` Jean-Pierre Rosen
1999-12-07  0:00     ` David Starner
1999-12-08  0:00       ` Robert Dewar [this message]
1999-12-07  0:00     ` Samuel T. Harris
1999-12-07  0:00     ` Larry Kilgallen
1999-12-08  0:00     ` Robert Dewar
1999-12-08  0:00       ` Roger Racine
1999-12-08  0:00         ` Larry Kilgallen
1999-12-08  0:00           ` Roger Racine
1999-12-08  0:00             ` tmoran
1999-12-08  0:00             ` Larry Kilgallen
1999-12-09  0:00         ` Robert Dewar
1999-12-09  0:00           ` Roger Racine
1999-12-09  0:00             ` Larry Kilgallen
1999-12-10  0:00               ` Robert Dewar
1999-12-09  0:00             ` Mike Silva
1999-12-10  0:00               ` Robert Dewar
1999-12-16  0:00             ` Stefan Skoglund
1999-12-08  0:00       ` Robert A Duff
1999-12-08  0:00     ` Ted Dennison
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