C++ How fast is passing around objects?

Question

Assuming we are running a compiled C++ binary:

Is passing around an int (e.g. function to function, or writing it into variables) slower than passing around structs/class objects like the following?

class myClass
{
      int a;
      int b;
      char c;
      vector d;
      string e;
}

Answer 1

It depends on several factors, including the complexity of the copy-constructor and whether the compiler can do elision.

Answer 2

Any time something gets copied how long it takes is going to be a direct result of how big that thing is and what things its copy constructor does; obviously that class is larger than a single int, so it would be slower. If you pass a pointer or pass the thing by reference, there's no copy required and it takes the same amount of time