Passing arguments to functions with const parameters: is it faster?

Question

Consider, for example:

int sum(int a, int b)
{
    return a + b;
}

vs.

int sum(const int a, const int b)
{
    return a + b;
}
         


        

Answer 1

The answer probably depends on your compiler, the optimization level, and whether the compiler decides to inline the function. If you are curious about these things, it is easy to just look at the actual assembly produced by your compiler and find out.