From: "Jonas Nygren" <ehsjony@ehs.ericsson.se>
Subject: Ada versus Java - Tasking
Date: 1997/01/16
Date: 1997-01-16T00:00:00+00:00 [thread overview]
Message-ID: <01bc03ee$594dc520$829d6482@joy.ericsson.se> (raw)
I have written a small producer-consumer type of program
both in Ada and Java. To my astonishment the Java code
executes faster than the Ada code.
My test starts 50 producer-consumer pairs that run in
parallell. Each pair produces/consumes 1000 messages
of 50 bytes. I get the following timing on my P133,
16M, and running Win95:
Ada (Gnat 3.04a) : ~30 s
Java (MS SDK-Java) : ~15 s
This result was very much to my surprise!
I have tried to check over and over and I can not find
any errors in my code. Furthermore, with Java I managed
to start 400 producer-consumer pairs but the Ada version
stopped working already when 63 pairs were started
(62 pairs would run).
What is a reasonable explanation to this result. Both
Gnat and Java run on top of Win95's threads so there must
be something else that differs. It might be that Gnat 3.04a
is a bit dated and that the implementation in Win95 isn't
so good. It could also be that Ada tasking is inherently
'heavier' than Java's and that this accounts for the
differences.
I would be interested to understand this better if you have
any idea what is happening here.
/jonas
next reply other threads:[~1997-01-16 0:00 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-01-16 0:00 Jonas Nygren [this message]
1997-01-16 0:00 ` Ada versus Java - Tasking wiljan
1997-01-16 0:00 ` Brad Balfour
1997-01-25 0:00 ` Robert Dewar
1997-01-17 0:00 ` Jeff Carter
1997-01-19 0:00 ` David Taylor
1997-01-20 0:00 ` Jim Hopper
1997-01-20 0:00 ` Michael Paus
1997-01-21 0:00 ` Jim Hopper
1997-01-21 0:00 ` Larry Kilgallen
1997-01-21 0:00 ` jim hopper
1997-01-21 0:00 ` Dr. John B. Matthews
1997-01-23 0:00 ` Jeff Carter
1997-01-17 0:00 ` Steve Doiel
1997-01-18 0:00 ` Ole-Hjalmar Kristensen FOU.TD/DELAB
1997-01-19 0:00 ` Robert A Duff
1997-01-19 0:00 ` Ole-Hjalmar Kristensen FOU.TD/DELAB
1997-01-19 0:00 ` Larry Kilgallen
1997-01-19 0:00 ` Tom Moran
1997-01-20 0:00 ` Ole-Hjalmar Kristensen FOU.TD/DELAB
1997-01-20 0:00 ` Ada Tasking revisited (was: Re: Ada versus Java - Tasking) Ole-Hjalmar Kristensen FOU.TD/DELAB
1997-01-20 0:00 ` Ada versus Java - Tasking Dale Pontius
1997-01-20 0:00 ` Jon S Anthony
1997-01-21 0:00 ` Ole-Hjalmar Kristensen FOU.TD/DELAB
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