private static void formatListDate(List<Date> list) {

    StringBuilder buf = new StringBuilder();
    long start = System.nanoTime();
    for (Date dt : list) {
      buf.setLength(0);
      buf.append(dt.toString());
    }
    long end = System.nanoTime();
    System.out.println("Date:      Format: " + NF.format(end - start) + " ns" + " " + buf);
    result("JUDate-P", end - start);
  }