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/*
* Copyright (C) 2021, Luca Milanesio <luca.milanesio@gmail.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.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.internal.storage.file.FileRepository;
import org.eclipse.jgit.lib.*;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.transport.ReceiveCommand;
import org.eclipse.jgit.util.FS;
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.Param;
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.infra.Blackhole;
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;
import static org.eclipse.jgit.transport.ReceiveCommand.Type.CREATE;
@State(Scope.Thread)
public class GetRefsBenchmark {
ThreadLocalRandom branchIndex = ThreadLocalRandom.current();
@State(Scope.Benchmark)
public static class BenchmarkState {
@Param({ "true", "false" })
boolean useRefTable;
@Param({ "100", "2500", "10000", "50000" })
int numBranches;
@Param({ "true", "false" })
boolean trustFolderStat;
List<String> branches = new ArrayList<>(numBranches);
Path testDir;
Repository repo;
@Setup
@SuppressWarnings("boxing")
public void setupBenchmark() throws IOException, GitAPIException {
String firstBranch = "firstbranch";
testDir = Files.createDirectory(Paths.get("testrepos"));
String repoName = "branches-" + numBranches + "-trustFolderStat-"
+ trustFolderStat + "-" + refDatabaseType();
Path workDir = testDir.resolve(repoName);
Path repoPath = workDir.resolve(".git");
Git git = Git.init().setDirectory(workDir.toFile()).call();
RevCommit firstCommit = git.commit().setMessage("First commit")
.call();
git.branchCreate().setName(firstBranch).call();
StoredConfig cfg = git.getRepository().getConfig();
if (useRefTable) {
((FileRepository) git.getRepository()).convertRefStorage(
ConfigConstants.CONFIG_REF_STORAGE_REFTABLE, false,
false);
} else {
cfg.setBoolean(ConfigConstants.CONFIG_CORE_SECTION, null,
ConfigConstants.CONFIG_KEY_TRUSTFOLDERSTAT,
trustFolderStat);
}
cfg.setInt(ConfigConstants.CONFIG_RECEIVE_SECTION, null,
"maxCommandBytes", Integer.MAX_VALUE);
cfg.save();
repo = RepositoryCache.open(RepositoryCache.FileKey
.lenient(repoPath.toFile(), FS.DETECTED));
System.out.println("Preparing test");
System.out.println("- repository: \t\t" + repoPath);
System.out.println("- refDatabase: \t\t" + refDatabaseType());
System.out.println("- trustFolderStat: \t" + trustFolderStat);
System.out.println("- branches: \t\t" + numBranches);
BatchRefUpdate u = repo.getRefDatabase().newBatchUpdate();
branches = IntStream.range(0, numBranches)
.mapToObj(i -> "branch/" + i % 100 + "/" + i)
.collect(Collectors.toList());
for (String branch : branches) {
u.addCommand(new ReceiveCommand(ObjectId.zeroId(),
firstCommit.toObjectId(), Constants.R_HEADS + branch,
CREATE));
}
System.out.println();
System.out.print(
String.format("Creating %d branches ... ", numBranches));
try (RevWalk rw = new RevWalk(repo)) {
u.execute(rw, new TextProgressMonitor());
}
System.out.println("DONE");
}
private String refDatabaseType() {
return useRefTable ? "reftable" : "refdir";
}
@TearDown
public void teardown() throws IOException {
repo.close();
FileUtils.delete(testDir.toFile(),
FileUtils.RECURSIVE | FileUtils.RETRY);
}
}
@Benchmark
@BenchmarkMode({ Mode.AverageTime })
@OutputTimeUnit(TimeUnit.MICROSECONDS)
@Warmup(iterations = 2, time = 100, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 2, time = 10, timeUnit = TimeUnit.SECONDS)
public void testGetExactRef(Blackhole blackhole, BenchmarkState state)
throws IOException {
String branchName = state.branches
.get(branchIndex.nextInt(state.numBranches));
blackhole.consume(state.repo.exactRef(branchName));
}
@Benchmark
@BenchmarkMode({ Mode.AverageTime })
@OutputTimeUnit(TimeUnit.MICROSECONDS)
@Warmup(iterations = 2, time = 100, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 2, time = 10, timeUnit = TimeUnit.SECONDS)
public void testGetRefsByPrefix(Blackhole blackhole, BenchmarkState state)
throws IOException {
String branchPrefix = "refs/heads/branch/" + branchIndex.nextInt(100)
+ "/";
blackhole.consume(
state.repo.getRefDatabase().getRefsByPrefix(branchPrefix));
}
public static void main(String[] args) throws RunnerException {
Options opt = new OptionsBuilder()
.include(GetRefsBenchmark.class.getSimpleName())
// .addProfiler(StackProfiler.class)
// .addProfiler(GCProfiler.class)
.forks(1).jvmArgs("-ea").build();
new Runner(opt).run();
}
}
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