Which is faster Abstract class or interface and why

Question

Hi Which is faster Abstract class or interface and why

Vulpes · Answer

If you're talking here about execution speed then an interface has none at all because it can't be instantiated and can't contain executable code of any description. Although an abstract class can't be instantiated it may contain executable code including static methods/properties and an instance constructor which is called by its base classes. It's execution speed will therefore depend on the speed of such executable code and whether and to what extent it's invoked within the application.

R J · Answer

Abstract class -- it may or may not include abstract methods. This requires more time to find the actual method in the corresponding classes while compilation Interface -- will support only method signatures. it is fast. Also note that Interfaces will support multiple inheritance where abstract class doesn't.