No

Post #95,542 by Arkadiy 4/9/03 8:24:38 PM Reply	No C++ uses an index into an array of function pointers. Very fast, not terribly future-proof. Smaltallk (if I get it right) uses hashing on actual function signature. For most cases. My head is still spinning. -- It made Ketchup! Sweet Ketchup! Put it on a hot dog, put it on a burger, Put it on your sister and she'll holler blody murder! Sweet Ketchup. --Tom Paxton.
Post #95,609 by JimWeirich 4/9/03 11:33:43 PM Reply	Method Dispatch in Smalltalk Smaltalk (if I get it right) uses hashing on actual function signature. For most cases. My head is still spinning. Strickly speaking, you are correct. However, most modern Smalltalks will optimize that lookup quite heavily. A Cincom developer once described to me the mechanism they use to make method lookups (on the average) faster than the typical implementation of C++ virtual method dispatch. Fascinating stuff! -- -- Jim Weirich jweirich@one.net [link\|http://w3.one.net/~jweirich\|http://w3.one.net/~jweirich] --------------------------------------------------------------------- "Beware of bugs in the above code; I have only proved it correct, not tried it." -- Donald Knuth (in a memo to Peter van Emde Boas)
Post #95,782 by tuberculosis 4/10/03 1:39:03 PM Reply	Yep - pretty amazing stuff It totally depends on the implementation and there are a lot of really clever tricks. It might not seem like it - but ST actually (sometimes) gets you closer to the metal in a lot of nifty ways than something like C. Its very freaky. For instance, the opencroquet guys are moving a huge amount of rendering into graphics hardware despite the fact that you're calling it from Smalltalk with ST data structures. "Packed like lemmings into shiny metal boxes. Contestants in a suicidal race." - Synchronicity II - The Police

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