@Test
  // 1000000 times: 450 mills.
  // 1000000 times: 480 mills.
  // 1000000 times: 487 mills.
  public void toDate() {
    Date value = null;

    int count = 1000000; // 100w
    long beg = System.currentTimeMillis();
    for (int i = 0; i < count; i++) {
      value = CalendarHelper.toDate(CalendarHelper.today());
    }
    //
    long end = System.currentTimeMillis();
    System.out.println(count + " times: " + (end - beg) + " mills. ");

    System.out.println(DateHelper.toString(value));
    System.out.println(DateHelper.toString(value, DateHelper.DATE_TIME_MILLS_PATTERN));
  }