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List:       kde-devel
Subject:    Re: KDE / CORBA / C++ a historical viewpoint
From:       Roberto Alsina <ralsina () unl ! edu ! ar>
Date:       1999-09-17 11:32:21
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Bavo, are you really suggesting we should all dump everything and switch
to Java for KDE 2?

If no, what's the point on arging this right now? :-)

On Fri, 17 Sep 1999, Bavo De Ridder wrote:

> On Fri, 17 Sep 1999, Jo Dillon wrote:
> >Bavo De Ridder (bavo.deridder@cs.kuleuven.ac.be) spake thusly:
> >> Not when using native compiled Java.
> >
> >  That isn't a magic bullet. Compiled languages can be inefficient, and
> >given Java's admittedly-groovy dynamic method invocation, compiled java
> >is likely to be.
> >
> >-- 
> 
> Hmm, this is actually one of the points where Java is faster than C++ ....
> 
> C++ has mixed dynamic/static method invocation. Java only has dynamic method
> invocation. If you have lot's of virtual functions in C++ (see Qt ...) than
> Java will actually be faster than C++ ....
> 
> BTW (1): GCJ is a mixed compiled/interpreted system. The best of both worlds.
> 
> BTW (2): machinelanguage is faster than C which is faster than C++ ... you
> always pay a price. However, I think a full blown KDE 2/3 in C++ + CORBA will
> actually be slower and use more memory than KDE written in Java and compiled
> with gcj.
> 
> My experience show that a non-gui Java program is as fast as a C++ program, the
> memory usage is comparable (not counting the overhead of the VM which is static
> and won't grow when the program grows). For instance: alllocating 1000
> javax.mail.MailMessage's (this is not the exact name, but you now what kind of
> class I mean; I actually tested this once), gave a memory increase of 150-200
> Kb. Those MailMessage objects included configuration file support, multipart
> messages, dynamicly pluggable backend (Internet, Lotus Notes, ....). 
> 
> A GUI  program is slow because the bytecode is interpreted. Compiled code
> should improve dramatically on that.
> 
> 
> BDR
> 
> 

 ("\''/").__..-''"`-. .         Roberto Alsina
 `9_ 9  )   `-. (    ).`-._.`)  ralsina@unl.edu.ar
 (_Y_.)' ._   ) `._`.  " -.-'   Centro de Telematica
  _..`-'_..-_/ /-'_.'           Universidad Nacional del Litoral
(l)-'' ((i).' ((!.'             Santa Fe - Argentina
                                KDE Developer (MFCH)
Not mad, but bound more than a madman is (Romeo and Juliet, Act I Scene II)

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