Re: Java or C++?

Gerry Quinn wrote:
> I have seen such claims for many languages, including Java. Perhaps
> you would provide a link to an unbiased set of benchmark tests that
> demonstrate it.

Fortran vs C on some array benchmarks is probably a good bet. Fortran
compilers often do a lot of platform-specific cache-based optimisation that
a C compiler won't do.

You may also be interested in my ray tracer:

http://www.ffconsultancy.com/free/ray_tracer/languages.html

> My impression is that C tends to score rather highly in performance
> benchmarks.

I wrote a C implementation of my ray tracer. It was a lot slower than the
C++. I am sure I could have optimised to run just as fast but it is
seriously tedious and boring work, even for this 50LOC program. The C was
already the longest implementation at about 200LOC.

So a more important point is that, if you have a non-trivial program,
there's no way you're going to be able to find the time to optimise the
whole thing by hand. You need a language expressive enough that its
compiler will generate efficient code for you. That language isn't C/C++.

--
Dr Jon D Harrop, Flying Frog Consultancy
http://www.ffconsultancy.com
.

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