COM+ Unleashed

Speed of DCOM

So, why is DCOM six times or 20 microseconds slower? You can attribute the slower speed to COM+'s support for security, remoting, location transparency, class factories, and multiple interfaces. When you invoke a COM+ object, COM+ searches the registry to determine whether you have access to the object, whether the object needs to be constructed on a remote computer, and whether the object needs to be constructed in-process or out-of-process. COM+ also spends valuable microseconds retrieving the class factory that creates the COM+ class and the interfaces required by the client.

This time is not wasted, however. Class factories, multiple interfaces, security, remoting, and location transparency are all valuable features provided ...