Re: speed of Obj-C vs. C++(slightly OT)

[Philippe C . D . Robert]

On Wednesday, April 23, 2003, at 06:15 PM, Richard Frith-Macdonald 
wrote:
> On Wednesday, April 23, 2003, at 04:16  pm, Martin Häcker wrote:
> > You could either use a C-Package for the heavy work, or you could do 
> > the backend in C++ and the frontend in Cocoa on OS X.
> >
> > Though that makes it impossible to port it to GnuStep the advantage 
> > would be that you get the best of both worlds (C++ computation/Obj-C 
> > fast and maintainable gui building)
>
> Sounds like you are propogating the myth that C++ is faster than ObjC 
> ...
> Where like is compared with like, that's not the case, and in my 
> experience
> ObjC is faster because it's simpler and you can therefore devote more
> time to good design and optimisation.

Of course, a good design is much more worth than these performance 
advantages. But to remain fair, it is as well possible to create good 
designs in C++, plus ObjC method invocation is slower then C++ function 
calls, no matter what you do - as is a virtual function call slower 
than a static one :-)
On the other side, if you create a good OO design in C++ then you are 
often forced to use 'advanced' C++ features (incl. virtual functions) 
which are not as fast neither.

But IMHO most important is that the part which requires the most tuning 
will most likely be written in plain C and then 'integrated' in C++ or 
ObjC code, so I guess the slight performance advantage of the language 
C++ over the language ObjC does not matter...

-Phil
--
Philippe C.D. Robert
http://www.nice.ch/~phip