private final StringSubscriber s2 = new StringSubscriber("s2");
  private final ImmutableList<Subscriber> stringSubscribers =
      ImmutableList.of(
          subscriber(bus, s1, "handleString", String.class),
          subscriber(bus, s2, "handleString", String.class));

  private final ConcurrentLinkedQueue<Object> dispatchedSubscribers = new ConcurrentLinkedQueue<>();

  private Dispatcher dispatcher;

    eventBus.register(this);
  }

  @Benchmark
  void postStrings(int reps) {
    for (int i = 0; i < reps; i++) {
      eventBus.post("hello there");
    }
  }

  @Subscribe
  public void handleStrings(String string) {
    // Nothing to do here.
  }