[Mono-devel-list] VTable & Interfaces

Ben Maurer bmaurer at ximian.com
Mon Feb 28 14:31:04 EST 2005

> Hi!
> I just looked at the VTable and hope someone can confirm my 'findings':
> Each virtual method that is part of an interface has (at least?) two
> entries in the VMT: One in the 'class' area, a second one in the
> 'interface' area. Even more pointers to the same method are possible in
> the interface section. (?)
> In a nutshell: Recompiling virtual methods has very high costs, as all
> VTables have to be searched for occurrencies of the method pointer in
> the class and the interface section. Thereby even the slot in the
> interface section is unkown, so a look at all pointers is needed.

For some meanings of `very high costs'. The cost is likely orders of
magnitude less than the actual recompilation.

-- Ben

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