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Technology Stocks : BORL: Time to BUY!
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To: David R who wrote (8254)12/28/1997 8:03:00 PM
From: Kashish King  Read Replies (1) of 10836
 
Inproc COM function calls are as fast as normal DLL calls, and faster that vtable lookups.

There is no requirement that you make vtable calls so if you are worried about an extra pointer dereference don't use one. Design your application using C++ classes and wrap those interaces with COM if and only if you have some compelling reason to do that: speed is not one of them. The only real advantage with COM is going to be realized using the dispatch interface. The dispatch interface is NOT faster than a vtable lookup and is about as slow as it gets when you compare a DLL or STATIC class interface as I mentioned in my first post. I suppose if you don't have an extensible, modular, object-oriented approach and you're leaning toward Visual Basic anyway, then hacking out COM interfaces is the way to go.
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