From: andreatta@mail.chem.sc.edu (Dan Andreatta)
Subject: Re: compiler benchmark comparisons
Date: 1 Mar 2002 15:17:56 -0800
Date: 2002-03-01T23:17:57+00:00 [thread overview]
Message-ID: <338040f8.0203011517.5a1ebdeb@posting.google.com> (raw)
In-Reply-To: 5ee5b646.0202282107.6f3dd89a@posting.google.com
> examples like this in detail, we discover that what
> people think are "identical" programs are in fact totally different
Er... you are right. (At this time Google hasn't reported any reply).
I did some more experiments, and the bottleneck for the compiler was
in the genration of the code for Integer'Image(). I modified the loop,
and now it look more like the C version, relying on the I/O library
(using Ada.Integer_Text_IO).
Amazingly, now it compiles in about 2 seconds. Summarizing, these are
the data (below are the fragments of the codes used):
GNU/C GNU/Ada (1) GNU/Ada (2)
GNU/Ada (3)
Source size (kB) 45 82 103
97
Object size (kB) 63 503 503
109
time to compile (s) 1.4 11.0 8.0
2.2
compiled with gcc -c file.adb (no switches)
In conclusion... draw your own conclusion.
Memo for me: next time don't spare resources, use at lest 2 neurons
:-)
The codes for the loops (repeated 1000 times) were:
GNU/C
for (i=0; i<100; ++i)
printf("%d\n",i);
GNU/Ada (1)
for i in 1..100 loop
ada.text_io.put_line( Integer'Image(i) );
end loop;
GNU/Ada (2)
i := 0;
while i<100 loop
ada.text_io.put_line( Integer'Image(i) );
end loop;
GNU/Ada (3)
for i in 1..100 loop
ada.integer_text_io.put( i );
ada.text_io.new_line;
end loop;
next prev parent reply other threads:[~2002-03-01 23:17 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <3C74E519.3F5349C4@baesystems.com>
[not found] ` <20020221205157.05542.00000012@mb-cm.news.cs.com>
2002-02-22 12:19 ` naval systems David Gillon
2002-02-22 14:55 ` Marin David Condic
2002-02-23 5:54 ` David Starner
2002-02-25 15:05 ` Marin David Condic
2002-02-26 2:34 ` Larry Kilgallen
2002-02-26 17:44 ` David Starner
2002-02-26 19:49 ` Pat Rogers
2002-02-26 19:55 ` Ray Blaak
2002-02-26 20:46 ` Pat Rogers
2002-02-26 22:41 ` Ray Blaak
2002-02-27 0:02 ` Pat Rogers
2002-02-27 5:01 ` David Starner
2002-02-27 9:38 ` Jean-Pierre Rosen
2002-02-27 19:48 ` compiler benchmark comparisons (was: naval systems) Wes Groleau
2002-02-27 21:51 ` Pat Rogers
2002-03-01 2:04 ` David Starner
2002-03-01 4:06 ` Pat Rogers
2002-02-27 23:53 ` Gary Barnes
2002-02-28 2:19 ` Dan Andreatta
2002-02-28 10:04 ` Jerry van Dijk
2002-02-28 13:35 ` compiler benchmark comparisons Georg Bauhaus
2002-02-28 18:12 ` Dan Andreatta
2002-03-01 5:07 ` Robert Dewar
2002-03-01 16:43 ` Dan Andreatta
2002-03-01 23:17 ` Dan Andreatta [this message]
2002-03-01 23:40 ` tmoran
2002-02-28 14:18 ` compiler benchmark comparisons (was: naval systems) Wes Groleau
2002-02-28 14:31 ` Ted Dennison
2002-02-28 18:33 ` Dan Andreatta
2002-02-28 21:14 ` Wes Groleau
2002-02-28 14:01 ` Wes Groleau
2002-03-01 22:01 ` Randy Brukardt
2002-02-28 15:58 ` Larry Kilgallen
[not found] ` <338040f8.0202271819.373f733a@Organization: LJK Software <TgAW8WWqYgP5@eisner.encompasserve.org>
2002-03-01 19:29 ` Robert Dewar
2002-03-02 11:12 ` Pascal Obry
2002-03-02 19:49 ` Richard Riehle
[not found] ` <5ee5b646.0203011129.1bdbac56@po <ug03ji5ow.fsf@wanadoo.fr>
2002-03-02 18:20 ` Simon Wright
2002-02-27 2:28 ` naval systems David Starner
2002-02-27 21:44 ` Pat Rogers
2002-03-01 2:59 ` David Starner
2002-03-01 15:33 ` Pat Rogers
2002-03-01 17:22 ` Jeffrey Carter
2002-03-03 5:21 ` David Starner
2002-02-26 22:40 ` Pascal Obry
2002-02-27 0:42 ` David Starner
2002-02-23 19:18 ` John R. Strohm
2002-02-23 18:36 ` martin.m.dowie
2002-02-25 15:10 ` Marin David Condic
2002-02-28 16:33 ` tony gair
2002-02-28 17:33 ` David Gillon
2002-02-28 21:18 ` Wes Groleau
2002-03-01 17:31 ` Boeing 777 (WAS: naval systems) Simon Pilgrim
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