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From: Ole-Hjalmar Kristensen
 <ole-hjalmar.kristensen@substitute_employer_here.com>
Newsgroups: comp.lang.ada
Subject: Re: 'Base
Date: 12 Dec 2005 10:14:38 +0100
Organization: Sun Microsystems
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My gut reaction was also that Ada will always outperform Java, but I
have found at least one case there this is not true.  I recently wrote
a simple test program to transpose a two-dimensional array in Java,
Ada, C++, and C. The purpose was not really to compare languages, but
to see the effects of caching. There were two different alogrithms
used, one a simple nested loop, the other a recursive subdivision with
a nested loop at the lowest level. When the simple nested loop was
tested with large data sets (~ available RAM on the machines) the
diffence between Ada, C, and C++ was insignificant, all being 3-4
times faster than Java. However, when testing the recursive version, I
found that Java was actually about 10% faster than the other three,
which again came extremely close to each other. Apparently the JIT
compiler had plenty of time to do its work and come up with pretty
optimal code. The other interesting result from the experiment was
that the recursive  version was from 3-4 to 20 times faster than the
simple nested loop.


>>>>> "MK" == Martin Krischik <krischik@users.sourceforge.net> writes:
<snip>
    MK> Ada arrays are not a primitive type - they are a quite complex and powerfull
    MK> type.

    MK> Performace? Ada allways outperform Java for a start. But Ada's build in
    MK> checks will also outperform C/C++ when used with all appropriate
    MK> "assert()"s in place.

<snip>
-- 
   C++: The power, elegance and simplicity of a hand grenade.