reinterpret_cast cast cost

Question

My understanding is that C++ reinterpret_cast and C pointer cast is a just a compile-time functionality and that it has no performance cost at all.

Is this true?

Answer 1

You're right, but think about it: reinterpret_cast means maybe a bad design or that you're doing something very low level.

dynamic-cast instead it will cost you something, because it has to look in a lookup table at runtime.