@Test // 1000000 times: 627 mills. // 1000000 times: 628 mills. // 1000000 times: 631 mills. public void begTimeOfDate() { Calendar calendar = CalendarHelper.today(); Calendar begTime = null; Calendar endTime = null; int count = 1000000; // 100w long beg = System.currentTimeMillis(); for (int i = 0; i < count; i++) { begTime = CalendarHelper.begTimeOfDate(calendar); } // long end = System.currentTimeMillis(); System.out.println(count + " times: " + (end - beg) + " mills. "); // System.out.println(CalendarHelper.toString(begTime)); beg = System.currentTimeMillis(); for (int i = 0; i < count; i++) { endTime = CalendarHelper.endTimeOfDate(calendar); } // end = System.currentTimeMillis(); System.out.println(count + " times: " + (end - beg) + " mills. "); System.out.println(CalendarHelper.toString(endTime)); }