#include <stdio.h>
#include <unistd.h>
#include <time.h>
#include <stdint.h>
#include <iostream>

/*
sla@sla-Inspiron-5720:~$ ./ios > /dev/null
44294
39727
71075
130222
sla@sla-Inspiron-5720:~$ ./ios > /dev/null
42322
39617
73667
134513
sla@sla-Inspiron-5720:~$ ./ios > /dev/null
53560
41909
74061
132310
sla@sla-Inspiron-5720:~$ ./ios > ~/123.txt
69455
157903
199676
284772
sla@sla-Inspiron-5720:~$ ./ios > ~/123.txt
68343
180498
170306
204986

 *
 */

static uint32_t getTick() {
    timespec ts;
    unsigned theTick = 0U;
    clock_gettime( CLOCK_REALTIME, &ts );
    theTick  = ts.tv_nsec / 1000;
    theTick += ts.tv_sec * 1000000;
    return theTick;
}

int main() {
  uint32_t tc;

  //---------------------------------

  std::ios::sync_with_stdio(false);

  tc = getTick();

  for(int i = 0; i < 1000000; ++i)
  {
    std::cout << "1234567890ABCDEF";
  }

  tc = getTick() - tc;

  std::cerr << tc << std::endl;

  //---------------------------------

  std::ios::sync_with_stdio(true);

  tc = getTick();

  for(int i = 0; i < 1000000; ++i)
  {
    std::cout << "1234567890ABCDEF";
  }

  tc = getTick() - tc;

  std::cerr << tc << std::endl;

  //---------------------------------

  tc = getTick();

  for(int i = 0; i < 1000000; ++i)
  {
    printf("1234567890ABCDEF");
  }

  tc = getTick() - tc;

  std::cerr << tc << std::endl;

  //---------------------------------

  tc = getTick();

  for(int i = 0; i < 1000000; ++i)
  {
    printf("%s", "1234567890ABCDEF");
  }

  tc = getTick() - tc;

  std::cerr << tc << std::endl;

  //---------------------------------
  //---------------------------------

  return 0;
}