[Bf-taskforce25] Complete Rewrite

[Patrick Sebastian Zimmermann]

Just a small side note,
the Java interpreter itself is written in C.
So saying that Java outperforms C simply can't be true in such a
general way.

Greetings,
Patrick

On Sun, 22 Mar 2009 13:54:38 +1100
Jonathan Merritt <jmerritt at warpax.com> wrote:

> Hi Joe,
> 
> On 22/03/2009, at 4:36 AM, joe wrote:
> > That is called Maya.  It's slow as hell and takes easily 5 times
> > the RAM blender does. :)
> >
> > Using C for an app like Blender is necessary, since you can't get  
> > the same RAM/speed out of most other languages.  Some of them can  
> > compile to native code, but that doesn't mean they're as fast; a  
> > high-level object-oriented language tends to have overhead from
> > both the garbage collection and the object model implementation.
> > Python is especially bad this way, but so is java, and it's been
> > optimized to hell.
> 
> I agree with most of what you're saying (esp. regarding memory use),  
> but in my experience, Java (Sun's JVM with hotspot) has been  
> performing about as well as C for numerical computation for some
> time now.  There is a bit of contention surrounding this topic, since
> it does partly depend on CPU cache usage, etc., and also on the C  
> compiler used.  But you paint the picture that Java is horrendously  
> slow, which simply isn't the case any more:
>      http://blogs.sun.com/dagastine/entry/java_is_faster_than_c
>      (that partisan blog post is from 2006)
> 
> Groups at CERN and NIST have invested time in developing Java  
> numerical libraries and applications.  Although numerical Java still  
> has very little traction, it is being used successfully.
> 
> Still, all of this is an academic discussion because Blender's
> current code base is in C already! :-)
> 
> Jonathan Merritt.
> 
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