| /* |
| * Copyright (C) 2019, Matthias Sohn <matthias.sohn@sap.com> |
| * and other copyright owners as documented in the project's IP log. |
| * |
| * This program and the accompanying materials are made available |
| * under the terms of the Eclipse Distribution License v1.0 which |
| * accompanies this distribution, is reproduced below, and is |
| * available at http://www.eclipse.org/org/documents/edl-v10.php |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * |
| * - Neither the name of the Eclipse Foundation, Inc. nor the |
| * names of its contributors may be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| 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()) |
| // .addProfiler(StackProfiler.class) |
| // .addProfiler(GCProfiler.class) |
| .forks(1).jvmArgs("-ea").build(); |
| new Runner(opt).run(); |
| } |
| } |