From: "Randy Brukardt" <randy@rrsoftware.com>
Subject: Re: speed of generic code in Ada (vs Java)
Date: Fri, 23 May 2008 19:16:07 -0500
Date: 2008-05-23T19:16:07-05:00 [thread overview]
Message-ID: <g17mpq$rp3$1@jacob-sparre.dk> (raw)
In-Reply-To: wcc1w3seile.fsf@shell01.TheWorld.com
"Robert A Duff" <bobduff@shell01.TheWorld.com> wrote in message
news:wcc1w3seile.fsf@shell01.TheWorld.com...
> "Randy Brukardt" <randy@rrsoftware.com> writes:
...
>> The net effect is that generalizations about Ada performance are probably
>> not well-founded. Usually, Ada performance is similar to that of C++, but
>> implementation differences can be a big deal and more different than
>> those
>> between languages.
>
> I disagree. Performance of Ada is pretty-close to C and C++ in most
> cases. Performance of Ada is better than Java (and Smalltalk and ...)
> in most cases. The implementation matters, but the language rules
> matter more.
You haven't used a wide enough variety of Ada compilers if you say that.
Janus/Ada in particular. :-) The performance characteristics of Janus/Ada
are very different than GNAT, on a variety of things: generics,
discriminanted records, exceptions, tasking, just to name a few. (Sometimes
better, sometimes worse.) Another example would be the old AdaEd compiler,
where the result was always interpreted.
I agree that the language characteristics have a role to play (especially
things that require dynamic memory allocation, implicitly or explicitly),
but the implementation differences also matter a lot. I'd expect that a
highly optimized Java JIT compiler would beat AdaEd on most measures, for
example.
Randy.
prev parent reply other threads:[~2008-05-24 0:16 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-16 17:31 speed of generic code in Ada (vs Java) jhc0033
2008-05-16 18:12 ` jimmaureenrogers
2008-05-16 18:54 ` Ludovic Brenta
2008-05-17 1:50 ` jhc0033
2008-05-17 2:04 ` Georg Bauhaus
2008-05-17 6:32 ` Niklas Holsti
2008-05-17 8:07 ` Ludovic Brenta
2008-05-17 21:37 ` Gautier
2008-05-17 23:31 ` Ivan Levashew
2008-05-22 22:01 ` Florian Weimer
2008-05-21 8:12 ` Graham
2008-05-21 15:41 ` Robert A Duff
2008-05-22 0:06 ` Randy Brukardt
2008-05-23 22:55 ` Robert A Duff
2008-05-24 0:16 ` Randy Brukardt [this message]
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