// references/Compete.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.io.*;
import onjava.Timer;

class Thing1 implements Serializable {}
class Thing2 implements Serializable {
 Thing1 t1 = new Thing1();
}

class Thing3 implements Cloneable {
 @Override
 public Thing3 clone() {
 try {
 return (Thing3)super.clone();
 } catch(CloneNotSupportedException e) {
 throw new RuntimeException(e);
 }
 }
}

class Thing4 implements Cloneable {
 private Thing3 t3 = new Thing3();
 @Override
 public Thing4 clone() {
 Thing4 t4 = null;
 try {
 t4 = (Thing4)super.clone();
 } catch(CloneNotSupportedException e) {
 throw new RuntimeException(e);
 }
 // Clone the field, too:
 t4.t3 = t3.clone();
 return t4;
 }
}

public class Compete {
 public static final int SIZE = 100000;
 public static void
 main(String[] args) throws Exception {
 Thing2[] a = new Thing2[SIZE];
 for(int i = 0; i < SIZE; i++)
 a[i] = new Thing2();
 Thing4[] b = new Thing4[SIZE];
 for(int i = 0; i < SIZE; i++)
 b[i] = new Thing4();
 Timer timer = new Timer();
 try(
 ByteArrayOutputStream buf =
 new ByteArrayOutputStream();
 ObjectOutputStream oos =
 new ObjectOutputStream(buf)
 ) {
 for(Thing2 a1 : a) {
 oos.writeObject(a1);
 }
 // Now get copies:
 try(
 ObjectInputStream in =
 new ObjectInputStream(
 new ByteArrayInputStream(
 buf.toByteArray()))
 ) {
 Thing2[] c = new Thing2[SIZE];
 for(int i = 0; i < SIZE; i++)
 c[i] = (Thing2)in.readObject();
 }
 }
 System.out.println(
 "Duplication via serialization: " +
 timer.duration() + " Milliseconds");

 // Now try cloning:
 timer = new Timer();
 Thing4[] d = new Thing4[SIZE];
 for(int i = 0; i < SIZE; i++)
 d[i] = b[i].clone();
 System.out.println(
 "Duplication via cloning: " +
 timer.duration() + " Milliseconds");
 }
}
/* Output:
Duplication via serialization: 516 Milliseconds
Duplication via cloning: 71 Milliseconds
*/