1  
   2  /* Put this line at the top of the file: */
   3  #include <sys/time.h>
   4  
   5  /* Put this right before the code you want to time: */
   6  struct timeval timer_start, timer_end;
   7  gettimeofday(&timer_start, NULL);
   8  
   9  /* Put this right after the code you want to time: */
  10  gettimeofday(&timer_end, NULL);
  11  double timer_spent = timer_end.tv_sec - timer_start.tv_sec + (timer_end.tv_usec - timer_start.tv_usec) / 1000000.0;
  12  printf("Time spent: %.6f\n", timer_spent);