@Test
  public void removeSpeedyArrayTest() {
    final RoaringBitmap rb = new RoaringBitmap();
    for (int i = 0; i < 10000; i++) rb.add(i);

    for (int i = 10000; i > 0; i++) {
      rb.highlowcontainer.remove(Util.highbits(i));
      Assert.assertEquals(rb.contains(i), false);
    }
  }