/*
* 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 org.apache.kafka.common.cache.LRUCache;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Level;
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)
public class LRUCacheBenchmark {
private LRUCache<String, String> lruCache;
private final String key = "the_key_to_use";
private final String value = "the quick brown fox jumped over the lazy dog the olympics are about to start";
int counter;
@Setup(Level.Trial)
public void setUpCaches() {
lruCache = new LRUCache<>(100);
}
@Benchmark
public String testCachePerformance() {
counter++;
lruCache.put(key + counter, value + counter);
return lruCache.get(key + counter);
}
public static void main(String[] args) throws RunnerException {
Options opt = new OptionsBuilder()
.include(LRUCacheBenchmark.class.getSimpleName())
.forks(2)
.build();
new Runner(opt).run();
}
}