Re: java versus C or C++ for number crunching
On Tue, 25 Mar 2008 14:51:35 -0700, johnmortal.forums wrote:
This is the sort of question that I hope won't start an unhappy
discussion, but I wanted to know whether there are any well accepted
tests comparing java to C++ (or C) for doing extensive number crunching
(e.g. multiplying 100,000 vectors in three space by various matrics, and
maybe even a lot of trig used to generate those matrices, so lots of
[Snip]
Some basic guidelines..
C++ will be faster with object creation and destruction .. a lot faster
in my experience. If you are going to be creating and destroying many
objects the math won't matter.
Java is faster, or as fast in math on primitive types.
Java on Intel will be much slower than C on trig functions. This problem
can be reduced a bit by having a wrapper class that does the trig calls
using JNI, but it will still be slower than C. On other hardware
platforms this isn't a problem. On some Intel it might not be a problem
based on the results of an experiment recently conducted in this forum on
another thread (see Sines and Cosines).
--
Kenneth P. Turvey <kt-usenet@squeakydolphin.com>