Hi,

I have my own version of a RoundRobinRouting logic which I believe it is 
faster and less CPU intensive due to no mod math operation, here is my 
version in Java 8, it has though one small error because NoRoutee instance 
if private and I don't know much Scala, so here it is a copy/proposal :

public class CircularRoutingLogic implements RoutingLogic {

  final AtomicInteger next = new AtomicInteger(-1);

  @Override
  public Routee select(Object message, IndexedSeq<Routee> routees) {
    final int size = routees.size();

    // null should be replaced by NoRoutee Akka/Scala instance.
    return size == 0 ? null : routees.apply(next.accumulateAndGet(1, (index, 
increment) -> ++index >= size ? 0 : index));
  }
}

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