calloc_test.c

#include <stdio.h>
#include <microtime.h>
#include <string.h>
#include <stdlib.h>

int main(int argc, char **argv)
{
  int i, vector_size = 200000000;
  float *vector1, *vector2;
  double time1, time2;

  /* allocate and set to zero */
  time1 = microtime();
  vector1 = calloc(vector_size, sizeof(float));
  time2 = microtime();

  printf("1. Time = %g us\tTimer Resolution = %g us\n", time2-time1, get_microtime_resolution());

  time1 = microtime();
  vector2 = malloc(vector_size * sizeof(float));
  for (i = 0; i < vector_size; ++i) {
    vector2[i] = 0;
  }
  time2 = microtime();
  printf("2. Time = %g us\tTimer Resolution = %g us\n", time2-time1, get_microtime_resolution());

  /* cleanup */
  free(vector1);
  free(vector2);

  return 0;
}