#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>

#define MEGABYTE 1048576

int main (void)
{
    unsigned int i;
    void *a = NULL;
    void *b = NULL;
    struct timeval ts;
    struct timeval te;

    for (i = 1; i <= 200; i++) {
        gettimeofday(&ts, NULL);
        printf("Start two blocks of %d megabytes\n", i);
        
        a = realloc(a, i * MEGABYTE);
        b = realloc(b, i * MEGABYTE);
        
        if (NULL == a || NULL == b)
            exit(EXIT_FAILURE);
            
        memset(a, '0', i * MEGABYTE);
        memset(b, '1', i * MEGABYTE);
        memcpy(b, a, i * MEGABYTE);
 
        gettimeofday(&te, NULL);
	    
	    printf("Elapsed: %.2f sec\n", te.tv_sec - ts.tv_sec + (te.tv_usec - ts.tv_usec)/1000000.0);

        fflush(stdout);
    }
    
    exit(EXIT_SUCCESS);
}