kafka ImplicitLinkedHashCollectionBenchmark 源码
kafka ImplicitLinkedHashCollectionBenchmark 代码
文件路径:/jmh-benchmarks/src/main/java/org/apache/kafka/jmh/common/ImplicitLinkedHashCollectionBenchmark.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.kafka.jmh.common;
import org.apache.kafka.common.Uuid;
import org.apache.kafka.common.utils.ImplicitLinkedHashCollection;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.util.Comparator;
import java.util.concurrent.TimeUnit;
@State(Scope.Benchmark)
@Fork(value = 1)
@Warmup(iterations = 3)
@Measurement(iterations = 6)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MICROSECONDS)
public class ImplicitLinkedHashCollectionBenchmark {
public static class TestElement implements ImplicitLinkedHashCollection.Element {
private final String value;
private int next = ImplicitLinkedHashCollection.INVALID_INDEX;
private int prev = ImplicitLinkedHashCollection.INVALID_INDEX;
public TestElement(String value) {
this.value = value;
}
public String value() {
return value;
}
@Override
public int prev() {
return this.prev;
}
@Override
public void setPrev(int prev) {
this.prev = prev;
}
@Override
public int next() {
return this.next;
}
@Override
public void setNext(int next) {
this.next = next;
}
@Override
public int hashCode() {
return value.hashCode();
}
@Override
public boolean equals(Object o) {
if (!(o instanceof TestElement)) return false;
TestElement other = (TestElement) o;
return value.equals(other.value);
}
}
public static class TestElementComparator implements Comparator<TestElement> {
public static final TestElementComparator INSTANCE = new TestElementComparator();
@Override
public int compare(TestElement a, TestElement b) {
return a.value().compareTo(b.value());
}
}
@Param({"10000", "100000"})
private int size;
private ImplicitLinkedHashCollection<TestElement> coll;
@Setup(Level.Trial)
public void setup() {
coll = new ImplicitLinkedHashCollection<>();
for (int i = 0; i < size; i++) {
coll.add(new TestElement(Uuid.randomUuid().toString()));
}
}
/**
* Test sorting the collection entries.
*/
@Benchmark
public ImplicitLinkedHashCollection<TestElement> testCollectionSort() {
coll.sort(TestElementComparator.INSTANCE);
return coll;
}
}
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