Polymorphism

Dynamic Polymorphism

The Program determines which implementation of a Member Function to call at Runtime.

• Dynamic Polymorphism results in runtime overhead
• The way this dynamic lookup is achieved varies by implementation:
  • Look up the appropriate Label in a vtable
  • Duck Typing

Static Polymorphism

The Program determines which implementation of a Member Function to call at Compile-Time.

• Static Polymorphism involves no Runtime overhead, but instead compile-time overhead, which is obviously better for performance
• Compile-time resolution depends on implementation:
  • Curiously Recurring Template Pattern
  • Function Overloading
  • Templates