malloccliff.c

#import <stdlib.h>
#import <malloc/malloc.h>

#define SLOW 1

int main(int argc, const char * argv[]) {
#if SLOW
  int sizes[] = { 256032, 512032, 1024032, 1792032 };
  
  for (int ii = 0; ii < 10000; ii++) {
    void *previous = NULL;
    for (int i = 0; i < 4 ; i++) {
      void *next = calloc(1, sizes[i]);
      free(previous);
      previous = next;
    }
    free(previous);
  }
  
#else
  int sizes[] = { 160032, 320032, 480032, 640032, 800032, 960032, 1120032, 1280032 };
  
  for (int ii = 0; ii < 10000; ii++) {
    void *previous = NULL;
    for (int i = 0; i < 8 ; i++) {
      void *next = calloc(1, sizes[i]);
      free(previous);
      previous = next;
    }
    free(previous);
  }
  
#endif
  
  return 0;
}