// arrays/ParallelSort.java

// (c)2016 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://mindviewinc.com/Books/OnJava/ for more book information.

import java.util.*;

import java.time.*;

import onjava.*;

import static onjava.TimeIt.*;

public class ParallelSort {

static final int SZ = 10_000_000;

public static void main(String[] args) {

int[] ia1 = new Rand.int_().array(SZ);

int[] ia2 = Arrays.copyOf(ia1, ia1.length);

System.out.print("sort(): ");

long millis1 = timeIt(() -> Arrays.sort(ia1));

System.out.print("parallelSort(): ");

long millis2 = timeIt(() -> Arrays.parallelSort(ia2));

System.out.println(millis1/millis2);

}

}

/* Output:

sort(): 484

parallelSort(): 149

3

*/