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: <82mbqg$l7c$1@nnrp1.deja.com> (raw)
In-Reply-To: 82lcr0$tsg$1@nnrp1.deja.com
In article <82lcr0$tsg$1@nnrp1.deja.com>,
reason67@my-deja.com wrote:
> BTW: Both compilers were set at no optimization.
That statement tends to imply that you think the above statement
is relevant to someting or other in your measurements.
It is not!
The code generation techniques of Rational and GNAT are quite
different, and one thing you will find is that some compilers do
a fair amount of optimization even with all optimization turned
off (from one point of view, you could say that running faster
with optimization off is an indication that the compiler does
not have the (sometimes important) capability of really
suppressing all optimization.
In other words, we are reading your thread whose title sure
implies some competitive comparison, and now perhaps we think
that for some tests (but not all) running more SLOWLY might
indicate the preferred behavior. This is sure not the way most
people run or interpret benchmarks, and in particular you
mention showing the results to management -- I am pretty sure
they will be likely to misinterpret them :-)
Note that for a meaningful comparison of ACES quicklook, you
should most certainly make sure that all relevant optimizations
are on (probably -O2 -gnatn, maybe -funroll-loops, for GNAT, I
do not know what the appropriate Apex options might be).
Sent via Deja.com http://www.deja.com/
Before you buy.
next prev parent 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 ` Robert Dewar
1999-12-07 0:00 ` Roger Racine
1999-12-07 0:00 ` Larry Kilgallen
1999-12-07 0:00 ` Samuel T. Harris
1999-12-07 0:00 ` Jean-Pierre Rosen
1999-12-07 0:00 ` David Starner
1999-12-08 0:00 ` Robert Dewar
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 ` Mike Silva
1999-12-10 0:00 ` Robert Dewar
1999-12-09 0:00 ` Larry Kilgallen
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
1999-12-07 0:00 ` reason67
1999-12-08 0:00 ` Robert Dewar
1999-12-08 0:00 ` reason67
1999-12-08 0:00 ` Larry Kilgallen
1999-12-08 0:00 ` Robert Dewar [this message]
1999-12-08 0:00 ` Robert A Duff
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 ` reason67
1999-12-07 0:00 ` Robert Dewar
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
1999-12-10 0:00 ` Vladimir Olensky
1999-12-09 0:00 ` Vladimir Olensky
1999-12-07 0:00 ` reason67
1999-12-08 0:00 ` Robert Dewar
1999-12-08 0:00 ` reason67
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