36 lines
1.1 KiB
Java
36 lines
1.1 KiB
Java
// validating/BadMicroBenchmark2.java
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// (c)2017 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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// Relying on a common resource
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import java.util.*;
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import onjava.Timer;
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public class BadMicroBenchmark2 {
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// SIZE reduced to make it run faster:
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static final int SIZE = 5_000_000;
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public static void main(String[] args) {
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long[] la = new long[SIZE];
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Random r = new Random();
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System.out.println("parallelSetAll: " +
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Timer.duration(() ->
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Arrays.parallelSetAll(la, n -> r.nextLong())));
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System.out.println("setAll: " +
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Timer.duration(() ->
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Arrays.setAll(la, n -> r.nextLong())));
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SplittableRandom sr = new SplittableRandom();
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System.out.println("parallelSetAll: " +
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Timer.duration(() ->
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Arrays.parallelSetAll(la, n -> sr.nextLong())));
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System.out.println("setAll: " +
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Timer.duration(() ->
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Arrays.setAll(la, n -> sr.nextLong())));
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}
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}
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/* Output:
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parallelSetAll: 1147
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setAll: 174
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parallelSetAll: 86
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setAll: 39
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*/
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