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From: new@ee.udel.edu (Darren New)
Newsgroups: comp.sys.amiga
Subject: Re: Objective C is a Kludge ( was Re: An Intuition.device? )
Message-ID: <30465@nigel.ee.udel.edu>
Date: 14 Sep 90 16:09:10 GMT
References: <385@public.BTR.COM> <30261@nigel.ee.udel.edu> <389@public.BTR.COM>
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In article <389@public.BTR.COM> eeh@public.BTR.COM (Eduardo E. Horvath  eeh@btr.com) writes:
>>The dynamic function calls should not be particularly slow either,
>	Agreed, but Objecctive-C doesn't use function calls to invoke
>methods.  It sends messages.  

And the messages are looked up via a hash table and are turned into a call
on a function. Of course Objective-C uses function calls to invoke methods:
it compiles into C, and C only has functions.  Just like C++ turns a message
(i.e., virtual function call) into a function call through an indirect pointer.
The only slow-down in Obj-C is running up the inheritance heirarchy, which
I understand has been optimized very well in the later versions. --Darren

-- 
--- Darren New --- Grad Student --- CIS --- Univ. of Delaware ---
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