gistfile1.txt

For the original incomming damage of 10, we got: 54.405
And it took 102021 milliseconds.
For the new incoming damage of 10, we got: 54.405
And it took 3052727 milliseconds.
For the new parallel incoming damage of 10, we got: 52.4
And it took 4592186 milliseconds.

Streams.java

package com.gabizou;

import java.util.ArrayList;
import java.util.List;
import java.util.function.Function;

/**
 * Derp.
 */
public class StreamsTest {

    private static final List<Function<? super Double, Double>> functions = new ArrayList<>();


    /**
     * Derp.
     *
     * @param args derpington
     */
    public static void main(final String[] args) {
        functions.add(aDouble -> aDouble * 0.5);
        functions.add(aDouble -> aDouble + (-2.1));
        functions.add(aDouble -> aDouble * 0.95);

        final long oldStart = System.nanoTime();
        double damage = 10;
        for (Function<? super Double, Double> function : functions) {
            damage += function.apply(damage);
        }
        final double oldDamage = damage;
        final long oldEnd = System.nanoTime();
        final long oldDif = oldEnd - oldStart;

        damage = 10;
        final long newStart = System.nanoTime();
        final double newDamage = functions.stream().reduce(damage, (d, f) -> d + f.apply(d),
                (a, b) -> a + b);
        final long newEnd = System.nanoTime();
        final long newDif = newEnd - newStart;

        final long parStart = System.nanoTime();
        final double parDamage = functions.parallelStream().reduce(damage, (d, f) -> d + f.apply(d),
                (a, b) -> a + b);
        final long parEnd = System.nanoTime();
        final long parDif = parEnd - parStart;

        System.out.println("For the original incomming damage of 10, we got: " + oldDamage);
        System.out.println("And it took " + oldDif + " milliseconds.");
        System.out.println("For the new incoming damage of 10, we got: " + newDamage);
        System.out.println("And it took " + newDif + " milliseconds.");
        System.out.println("For the new parallel incoming damage of 10, we got: " + parDamage);
        System.out.println("And it took " + parDif + " milliseconds.");

    }

}