public class HelloBusTest { private static final int N = Integer.MAX_VALUE; public static void main(String[] args) { Bus<Event> bus = new Bus<>(Event.class); bus.register( e -> { e.message = "Hello from lambdas!"; }, 100); bus.register(EventListener.class); long now = System.currentTimeMillis(); for (int i = 0; i < N; i++) { Event e = new Event("Hello, World!"); bus.unsafeFireAndForget(e); } System.out.println(System.currentTimeMillis() - now); } public static final class EventListener { @Listener public static void onEvent(Event e) { e.message = "Hello from hand-crafted classes!"; } } public static final class Event { String message; public Event(String message) { this.message = message; } } }