Question

When declaring primitives does it matter if I use the assignment operator or copy constructor?
Which one gives the optimal performance, or do most compilers today compile these two statements to the same machine code?

int i = 1;
int j( 1 );

Answer 1

Same for:

  int i = 1;
  int j( 1 );

Not for:

  Cat d;
  Cat c1;
  c1 = d;
  Cat c2(d);//<-- more efficient