Benchmark.java

import java.util.Arrays;
import java.util.stream.Collectors;

public class Benchmark {

    public static void main(String[] args) {
        System.out.println(Arrays.asList(1, 2, 3, 4, 5)
                                 .stream()
                                 .filter(i -> i > 10)
                                 .map(i -> {
                                     try {
                                         Thread.sleep(10000L); // simulating hard work
                                         return i;
                                     }
                                     catch (InterruptedException e) {
                                         return 0;
                                     }
                                 })
                                 .collect(Collectors.toList()));
    }
}