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/*
* Copyright (C) 2022, 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.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.concurrent.TimeUnit;
import org.eclipse.jgit.junit.MockSystemReader;
import org.eclipse.jgit.util.SystemReader;
import org.eclipse.jgit.util.sha1.SHA1;
import org.eclipse.jgit.util.sha1.SHA1.Sha1Implementation;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
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;
@State(Scope.Thread)
public class SHA1Benchmark {
@State(Scope.Benchmark)
public static class BenchmarkState {
@Param({ "1", "2", "4", "8", "16", "32", "64" })
int size;
@Param({ "false", "true" })
boolean detectCollision;
@Param({ "java", "jdkNative" })
String impl;
private SecureRandom rnd;
byte[] content;
@Setup
public void setupBenchmark() {
SystemReader.setInstance(new MockSystemReader());
if (impl.equalsIgnoreCase(Sha1Implementation.JDKNATIVE.name())) {
System.setProperty("org.eclipse.jgit.util.sha1.implementation",
Sha1Implementation.JDKNATIVE.name());
}
content = new byte[size * 1024];
try {
rnd = SecureRandom.getInstanceStrong();
} catch (NoSuchAlgorithmException e) {
// ignore
}
rnd.nextBytes(content);
}
@TearDown
public void teardown() {
SystemReader.setInstance(null);
rnd = null;
}
}
@Benchmark
@BenchmarkMode({ Mode.AverageTime })
@OutputTimeUnit(TimeUnit.MICROSECONDS)
@Warmup(iterations = 2, time = 100, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 2, time = 5, timeUnit = TimeUnit.SECONDS)
@Fork(1)
public void testSHA1(Blackhole blackhole, BenchmarkState state) {
SHA1 hash = SHA1.newInstance();
hash.setDetectCollision(state.detectCollision);
hash.update(state.content);
blackhole.consume(hash.digest());
}
public static void main(String[] args) throws RunnerException {
Options opt = new OptionsBuilder()
.include(SHA1Benchmark.class.getSimpleName())
.forks(1).jvmArgs("-ea").build();
new Runner(opt).run();
}
}
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