For an in-proc COM component, a vtbl interface is generally in the order of 100 times faster than a dispinterface (although it depends on type of arguments in the function). For a out-of-proc component, the overhead of marshalling is more significant than overhead of IDispatch::invoke and so a vtbl interface is generally 2.5 times faster than a dispinterface. For a remote component however, it doesn


What is Metadata?
What is metadata? Well, It’s an odd concept to wrap your head around. Metadata is essentially the secondary layer of data that tracks details about the “regular” data. The regular