35 lines
1.0 KiB
Java
35 lines
1.0 KiB
Java
// arrays/BadMicroBenchmark3.java
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// (c)2016 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://mindviewinc.com/Books/OnJava/ 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 static onjava.TimeIt.*;
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public class BadMicroBenchmark3 {
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static final int SIZE = 20_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.print("parallelSetAll: ");
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timeIt(() ->
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Arrays.parallelSetAll(la, n -> r.nextLong()));
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System.out.print("setAll: ");
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timeIt(() ->
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Arrays.setAll(la, n -> r.nextLong()));
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SplittableRandom sr = new SplittableRandom();
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System.out.print("parallelSetAll: ");
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timeIt(() ->
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Arrays.parallelSetAll(la, n -> sr.nextLong()));
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System.out.print("setAll: ");
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timeIt(() ->
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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: 5150
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setAll: 649
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parallelSetAll: 277
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setAll: 246
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*/
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