kafka LRUCacheBenchmark 源码
kafka LRUCacheBenchmark 代码
文件路径：/jmh-benchmarks/src/main/java/org/apache/kafka/jmh/cache/LRUCacheBenchmark.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.cache;
import java.util.concurrent.TimeUnit;
import org.apache.kafka.common.cache.LRUCache;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.runner.Runner;
import org.openjdk.jmh.runner.RunnerException;
import org.openjdk.jmh.runner.options.Options;
import org.openjdk.jmh.runner.options.OptionsBuilder;
/**
* This is a simple example of a JMH benchmark.
*
* The sample code provided by the JMH project is a great place to start learning how to write correct benchmarks:
* http://hg.openjdk.java.net/code-tools/jmh/file/tip/jmh-samples/src/main/java/org/openjdk/jmh/samples/
*/
@State(Scope.Thread)
@OutputTimeUnit(TimeUnit.MILLISECONDS)
public class LRUCacheBenchmark {
private static final int DISTINCT_KEYS = 10_000;
private static final String KEY = "the_key_to_use";
private static final String VALUE = "the quick brown fox jumped over the lazy dog the olympics are about to start";
private final String[] keys = new String[DISTINCT_KEYS];
private final String[] values = new String[DISTINCT_KEYS];
private LRUCache<String, String> lruCache;
private long counter = 0;
@Setup(Level.Trial)
public void setUp() {
for (int i = 0; i < DISTINCT_KEYS; ++i) {
keys[i] = KEY + i;
values[i] = VALUE + i;
}
lruCache = new LRUCache<>(100);
}
@Benchmark
public String testCachePerformance() {
counter++;
int index = (int) (counter % DISTINCT_KEYS);
String hashkey = keys[index];
lruCache.put(hashkey, values[index]);
return lruCache.get(hashkey);
}
public static void main(String[] args) throws RunnerException {
Options opt = new OptionsBuilder()
.include(LRUCacheBenchmark.class.getSimpleName())
.forks(2)
.build();
new Runner(opt).run();
}
}
相关信息
相关文章
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦