/** {@inheritDoc} */
  @Override
  public void printMemoryStats() {
    super.printMemoryStats();

    X.println(">>>   threadsSize: " + threads.size());
    X.println(">>>   futsSize: " + futs.size());
  }
 /** @return Number of entries in this partition (constant-time method). */
 public int size() {
   return map.size();
 }