code: public int getLoad() {
          int res = 0;
          final Actor actors[] = this.actors;
          for (int i = 0; i < actors.length; i++) {
              Queue queue = actors[i].__mailbox;
              int load = queue.size() * 100 / actors[i].__mailboxCapacity;
              if ( load > res )
                  res = load;
              queue = actors[i].__cbQueue;
              load = queue.size() * 100 / actors[i].__mailboxCapacity;
              if ( load > res )
                  res = load;
          }
          return res;
      }
docs: WARNING: call rarely, this method might have O(n) runtime with default unbounded queues.
  
  @return percentage of queue fill of max actor