cout or printf which of the two has a faster execution speed C++?

Question

I have been coding in C++ for a long time. I always wondered which has a faster execution speed printf or cout?

Situation: I am designing a

Answer 1

To settle this:

#include 
#include 
#include 
using namespace std;

int main( int argc, char * argcv[] ) {
    const char * const s1 = "some text";
    const char * const s2 = "some more text";
    int x = 1, y = 2, z = 3;
    const int BIG = 2000;
    time_t now = time(0);
    for ( int i = 0; i < BIG; i++ ) {
        if ( argc == 1 ) {
            cout  << i << s1 << s2 << x << y << z << "\n";
        }
        else {
            printf( "%d%s%s%d%d%d\n", i, s1, s2, x, y, z );
        }
    }
    cout << (argc == 1 ? "cout " : "printf " ) << time(0) - now << endl;
}

produces identical timings for cout and printf.