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