| /* |
| * 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.io.IOException; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.eclipse.jgit.internal.storage.file.FileSnapshot; |
| import org.eclipse.jgit.util.FileUtils; |
| import org.openjdk.jmh.annotations.Benchmark; |
| import org.openjdk.jmh.annotations.BenchmarkMode; |
| import org.openjdk.jmh.annotations.Measurement; |
| 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.annotations.Warmup; |
| 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.Thread) |
| public class CreateFileSnapshotBenchmark { |
| |
| Path path; |
| |
| Path testDir; |
| |
| @Setup |
| public void setupBenchmark() throws IOException { |
| testDir = Files.createTempDirectory("dir"); |
| path = testDir.resolve("toSnapshot"); |
| Files.createFile(path); |
| } |
| |
| @TearDown |
| public void teardown() throws IOException { |
| FileUtils.delete(testDir.toFile(), FileUtils.RECURSIVE | FileUtils.RETRY); |
| } |
| |
| @Benchmark |
| @BenchmarkMode({ Mode.AverageTime }) |
| @OutputTimeUnit(TimeUnit.NANOSECONDS) |
| @Warmup(iterations = 5, time = 100, timeUnit = TimeUnit.MILLISECONDS) |
| @Measurement(iterations = 5, time = 100, timeUnit = TimeUnit.MILLISECONDS) |
| public Path testCreateFile() throws IOException { |
| return Files.createTempFile(testDir, "create", ""); |
| } |
| |
| @Benchmark |
| @BenchmarkMode({ Mode.AverageTime }) |
| @OutputTimeUnit(TimeUnit.NANOSECONDS) |
| public FileSnapshot testCreateFileSnapshot() { |
| return FileSnapshot.save(path.toFile()); |
| } |
| |
| public static void main(String[] args) throws RunnerException { |
| Options opt = new OptionsBuilder() |
| .include(CreateFileSnapshotBenchmark.class.getSimpleName()) |
| .forks(1).jvmArgs("-ea").build(); |
| new Runner(opt).run(); |
| } |
| } |