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/*
* Copyright (C) 2019, Matthias Sohn <matthias.sohn@sap.com> and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0 which is available at
* https://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.eclipse.jgit.benchmarks;
import java.security.SecureRandom;
import java.util.concurrent.TimeUnit;
import org.eclipse.jgit.util.SimpleLruCache;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Group;
import org.openjdk.jmh.annotations.GroupThreads;
import org.openjdk.jmh.annotations.Mode;
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.annotations.TearDown;
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;
@State(Scope.Benchmark)
public class SimpleLruCacheBenchmark {
SecureRandom rnd = new SecureRandom();
private volatile SimpleLruCache<String, String> cache = new SimpleLruCache<>(
100, 0.2f);
private volatile int i;
@Setup
public void setupBenchmark() {
i = rnd.nextInt(250);
}
@TearDown
public void teardown() {
cache = null;
}
@Benchmark
@Group("readwrite")
@GroupThreads(1)
@BenchmarkMode({ Mode.AverageTime })
@OutputTimeUnit(TimeUnit.NANOSECONDS)
public SimpleLruCache<String, String> testCacheWrite() {
cache.put("k" + i, "v" + i);
return cache;
}
@Benchmark
@Group("readwrite")
@GroupThreads(1)
@BenchmarkMode({ Mode.AverageTime })
@OutputTimeUnit(TimeUnit.NANOSECONDS)
public SimpleLruCache<String, String> testCacheRead() {
cache.get("k" + i);
return cache;
}
public static void main(String[] args) throws RunnerException {
Options opt = new OptionsBuilder()
.include(SimpleLruCacheBenchmark.class.getSimpleName())
.forks(1).jvmArgs("-ea").build();
new Runner(opt).run();
}
}
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