$ cat a.c
#include <malloc.h>

int main() {
   int ** array = (int**)malloc(1000000 * sizeof(int*));
   int i;
   for (i = 100000; i--; ) {
      array[i] = (int*)malloc(sizeof(int));
   }
   for (i = 100000; i--; ) {
      free(array[i]);
   }
   free(array);
   return 0;
}

$ time a

real    0m0.014s
user    0m0.012s
sys     0m0.000s