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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())
- // .addProfiler(StackProfiler.class)
- // .addProfiler(GCProfiler.class)
- .forks(1).jvmArgs("-ea").build();
- new Runner(opt).run();
- }
- }
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