64 lines
1.6 KiB
Java
64 lines
1.6 KiB
Java
// collectiontopics/jmh/Queues.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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// Performance differences between Queues
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package collectiontopics.jmh;
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import org.openjdk.jmh.annotations.*;
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import java.util.*;
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import java.util.concurrent.*;
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@State(Scope.Thread)
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@OutputTimeUnit(TimeUnit.MICROSECONDS)
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@Warmup(iterations = 5, batchSize = 5000)
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@Measurement(iterations = 5, batchSize = 5000)
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@BenchmarkMode(Mode.SingleShotTime)
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@Fork(1)
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public class Queues {
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private Queue<String> queue;
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@Param({
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"java.util.LinkedList",
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"java.util.concurrent.ConcurrentLinkedQueue",
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"java.util.concurrent.LinkedBlockingQueue",
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"java.util.concurrent.LinkedTransferQueue",
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"java.util.concurrent.PriorityBlockingQueue",
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"java.util.PriorityQueue",
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// Requires a size for construction:
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//"java.util.concurrent.ArrayBlockingQueue",
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// Won't accept more than one element:
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//"java.util.concurrent.SynchronousQueue",
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// Requires "Delayed" elements:
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//"java.util.concurrent.DelayQueue",
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})
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private String type;
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@Param({
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"1",
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"10",
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"100",
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"1000",
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"10000",
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"100000"
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})
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private int size;
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@Setup
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@SuppressWarnings("unchecked")
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public void setup() throws Exception {
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queue = (Queue<String>)
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Class.forName(type).newInstance();
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for(int i = 0; i < size; i++)
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queue.add(Integer.toString(i));
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}
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@Benchmark
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public Queue<String> add() {
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queue.add("test");
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return queue;
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}
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@Benchmark
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public String poll() {
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return queue.poll();
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}
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}
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