From: Isaac Gouy <igouy@...>
Date: 2006-07-28T05:45:09+09:00
Subject: Re: For performance, write it in C


Hal Fulton wrote:
> Isaac Gouy wrote:
> >
> > That sounds wrong to me - I hear positive comments about Java
> > performance for long-running programs, not for programs that run in
> > under a second.
> >
>
> JIT is the key to a lot of that. Performance depends greatly on
> the compiler, the JVM, the algorithm, etc.
>
> I won a bet once from a friend. We wrote comparable programs in
> Java and C++ (some arbitrary math in a loop running a bazillion
> times).
>
> With defaults on both compiles, the Java was actually *faster*
> than the C++. Even I didn't expect that. But as I said, this
> sort of thing is highly dependent on many different factors.
>
>
> Hal

Sometimes when we look at different workloads we can see the
performance crossover when relatively slow startup is overcome, code
JIT'd and adaptive optimisation kicks in

http://shootout.alioth.debian.org/gp4/fulldata.php?test=nbody&p1=java-0&p2=gcc-0&p3=clean-0&p4=java-0