speed_test/malloc.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3 #include <xlocale.h>
   4 #include <stdarg.h>
   5 #include <unistd.h>
   6 #include <string.h>
   7
   8 struct list {
   9     struct hash* columns;
  10     int   numColumns;
  11 };
  12 struct hash {
  13     char value[40];
  14 };
  15
  16 int main() {
  17     srandomdev();
  18
  19     int i = 0; struct list* last;
  20     int num = atoi("8000000");
  21
  22     int size = 1000;
  23     /* Initialize initial list of revisions */
  24     struct list** revisionList = malloc(size * sizeof(struct list*));
  25
  26     struct hash standardColumn;
  27     strcpy(standardColumn.value, "Haha pieter");
  28     for (i = 0; i < num; i++) {
  29         if (size <= i) {
  30             size *= 2;
  31             revisionList = realloc(revisionList, size * sizeof(struct list*));
  32         }
  33
  34         struct list* a = malloc(sizeof(struct list));
  35         revisionList[i] = a;
  36
  37         a->numColumns = i % 5;
  38         a->columns = malloc(a->numColumns * sizeof(struct hash));
  39         int j;
  40         for (j = 0; j < a->numColumns; j++) {
  41             //ccolumns[currentColumn++] = st
  42             strncpy(a->columns[j].value, "Haha pieter is cool", 20);
  43         }
  44     }
  45
  46     printf("Num value at 3000 is: %i vs %i\n", revisionList[3000]->numColumns, (int) (5 * random()));
  47     return 0;
  48 }