BenchMark - printf vs cout vs write vs puts vs fputs

// g++ -O2 -W -Wall -Wextra printf-vs-cout.cpp -o printf-vs-cout.exe && ./printf-vs-cout.exe 1>/dev/null
#include <iostream>
#include <stdio.h>
#include <unistd.h>// Write
#ifdef WIN32
#   include <windows.h>
#else
#   include <sys/time.h>
#   include <sys/resource.h>
#endif
using namespace std;

double get_time();


/*
    Printf no args
        4.88426
    Printf 1 arg
        18.5892

    Puts no args
        4.51563
    Fputs no args
        2.98327

    Write no args
        20.6939

    Cout no args
        5.32271
    Cout 1 arg
        27.0982
*/

enum { LOOP_SIZE = 100000000 };

#define makeLoop( name, ... ) \
    cerr << name"\n"; \
    begin = get_time(); \
    for( int i=0; i<LOOP_SIZE; ++i ) \
    { \
        __VA_ARGS__; \
    } \
    cerr << '\t' << get_time()-begin << '\n';


int main()
{
    double begin = 0;

    makeLoop("Printf no args", printf("test\n"));
    makeLoop("Printf 1 arg", printf("test %d\n", i));
    cerr << '\n';
    makeLoop("Puts no args", puts("test\n"));
    makeLoop("Fputs no args", fputs("test\n", stdout));
    cerr << '\n';
    makeLoop("Write no args", write(1, "test\n", 5));
    cerr << '\n';
    makeLoop("Cout no args", cout << "test\n");
    makeLoop("Cout 1 arg", cout << "test" << i << '\n');

    return 0;
}


double get_time()
{
#   ifdef WIN32
        LARGE_INTEGER t, f;
        QueryPerformanceCounter(&t);
        QueryPerformanceFrequency(&f);
        return (double)t.QuadPart/(double)f.QuadPart;
#   else
        struct timeval t;
        struct timezone tzp;
        gettimeofday(&t, &tzp);
        return t.tv_sec + t.tv_usec*1e-6;
#   endif
}