Benchmark.java

package org.asynchttpclient.future;

import java.util.ArrayList;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 * @author Stepan Koltsov
 */
public class Benchmark {

    public static void main(String[] args) throws Exception {
        for (;;) {
            long start = System.currentTimeMillis();

            ArrayList<AbstractListenableFuture> futures = new ArrayList<>();

            for (int i = 0; i < 100; ++i) {

                Thread thread = new Thread(() -> {
                    for (int j = 0; j < 100_000; ++j) {
                        AbstractListenableFuture future = newFuture();
                        future.addListener(() -> {
                        }, null);
                        futures.add(future);
                    }
                });
                thread.start();
                thread.join();

                for (AbstractListenableFuture future : futures) {
                    future.runListeners();
                }
            }

            System.out.println(System.currentTimeMillis() - start);
        }
    }

    private static AbstractListenableFuture newFuture() {
        return new AbstractListenableFuture() {
                        @Override
                        public boolean cancel(boolean mayInterruptIfRunning) {
                            return false;
                        }

                        @Override
                        public boolean isCancelled() {
                            return false;
                        }

                        @Override
                        public boolean isDone() {
                            return false;
                        }

                        @Override
                        public Object get() throws InterruptedException, ExecutionException {
                            return null;
                        }

                        @Override
                        public Object get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
                            return null;
                        }

                        @Override
                        public void done() {

                        }

                        @Override
                        public void abort(Throwable t) {

                        }

                        @Override
                        public void touch() {

                        }

                        @Override
                        public CompletableFuture toCompletableFuture() {
                            return null;
                        }
                    };
    }

}