benchmarks/src/main/java/org/lmdbjava/bench/LevelDb.java at master · lmdbjava/benchmarks · GitHub

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* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

* http://www.apache.org/licenses/LICENSE-2.0

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

package org.lmdbjava.bench;

import static java.nio.ByteOrder.LITTLE_ENDIAN;

import static java.util.concurrent.TimeUnit.MILLISECONDS;

import static org.fusesource.leveldbjni.JniDBFactory.factory;

import static org.fusesource.leveldbjni.JniDBFactory.popMemoryPool;

import static org.fusesource.leveldbjni.JniDBFactory.pushMemoryPool;

import static org.iq80.leveldb.CompressionType.NONE;

import static org.openjdk.jmh.annotations.Level.Invocation;

import static org.openjdk.jmh.annotations.Level.Trial;

import static org.openjdk.jmh.annotations.Mode.SampleTime;

import static org.openjdk.jmh.annotations.Scope.Benchmark;

import java.io.IOException;

import net.jpountz.xxhash.StreamingXXHash64;

import net.jpountz.xxhash.XXHashFactory;

import java.util.Map.Entry;

import org.agrona.MutableDirectBuffer;

import org.agrona.concurrent.UnsafeBuffer;

import org.iq80.leveldb.DB;

import org.iq80.leveldb.DBIterator;

import org.iq80.leveldb.Options;

import org.iq80.leveldb.WriteBatch;

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.OutputTimeUnit;

import org.openjdk.jmh.annotations.Param;

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.BenchmarkParams;

import org.openjdk.jmh.infra.Blackhole;

@OutputTimeUnit(MILLISECONDS)

@Fork(1)

@Warmup(iterations = 3)

@Measurement(iterations = 3)

@BenchmarkMode(SampleTime)

public class LevelDb {

@Benchmark

public void readCrc(final Reader r, final Blackhole bh) throws IOException {

r.crc.reset();

try (DBIterator iterator = r.db.iterator()) {

for (iterator.seekToFirst(); iterator.hasNext(); iterator.next()) {

final Entry<byte[], byte[]> peeked = iterator.peekNext();

r.crc.update(peeked.getKey());

r.crc.update(peeked.getValue());

}

bh.consume(r.crc.getValue());

}

@Benchmark

public void readKey(final Reader r, final Blackhole bh) throws IOException {

for (final int key : r.keys) {

if (r.intKey) {

r.wkb.putInt(0, key);

} else {

r.wkb.putStringWithoutLengthUtf8(0, r.padKey(key));

}

bh.consume(r.db.get(r.wkb.byteArray()));

}

@Benchmark

public void readRev(final Reader r, final Blackhole bh) throws IOException {

try (DBIterator iterator = r.db.iterator()) {

for (iterator.seekToLast(); iterator.hasPrev(); iterator.prev()) {

final Entry<byte[], byte[]> peeked = iterator.peekPrev();

bh.consume(peeked.getValue());

}

@Benchmark

public void readSeq(final Reader r, final Blackhole bh) throws IOException {

try (DBIterator iterator = r.db.iterator()) {

for (iterator.seekToFirst(); iterator.hasNext(); iterator.next()) {

final Entry<byte[], byte[]> peeked = iterator.peekNext();

bh.consume(peeked.getValue());

}

@Benchmark

public void readXxh64(final Reader r, final Blackhole bh) throws IOException {

r.xxh.reset();

try (DBIterator iterator = r.db.iterator()) {

for (iterator.seekToFirst(); iterator.hasNext(); iterator.next()) {

final Entry<byte[], byte[]> peeked = iterator.peekNext();

r.xxh.update(peeked.getKey(), 0, peeked.getKey().length);

r.xxh.update(peeked.getValue(), 0, peeked.getValue().length);

}

bh.consume(r.xxh.getValue());

}

@Benchmark

public void write(final Writer w, final Blackhole bh) throws IOException {

w.write(w.batchSize);

}

@State(value = Benchmark)

public static class CommonLevelDb extends Common {

DB db;

/**

* Writable key buffer. Backed by a plain byte[] for LevelDB API ease.

MutableDirectBuffer wkb;

/**

* Writable value buffer. Backed by a plain byte[] for LevelDB API ease.

MutableDirectBuffer wvb;

@Override

public void setup(final BenchmarkParams b) throws IOException {

super.setup(b);

wkb = new UnsafeBuffer(new byte[keySize]);

wvb = new UnsafeBuffer(new byte[valSize]);

pushMemoryPool(1_024 * 512);

final Options options = new Options();

options.createIfMissing(true);

options.compressionType(NONE);

db = factory.open(tmp, options);

}

@Override

public void teardown() throws IOException {

reportSpaceBeforeClose();

db.close();

popMemoryPool();

super.teardown();

}

void write(final int batchSize) throws IOException {

final int rndByteMax = RND_MB.length - valSize;

int rndByteOffset = 0;

WriteBatch batch = db.createWriteBatch();

for (int i = 0; i < keys.length; i++) {

final int key = keys[i];

if (intKey) {

wkb.putInt(0, key, LITTLE_ENDIAN);

} else {

wkb.putStringWithoutLengthUtf8(0, padKey(key));

}

if (valRandom) {

wvb.putBytes(0, RND_MB, rndByteOffset, valSize);

rndByteOffset += valSize;

if (rndByteOffset >= rndByteMax) {

rndByteOffset = 0;

}

} else {

wvb.putInt(0, key);

}

batch.put(wkb.byteArray(), wvb.byteArray());

if (i % batchSize == 0) {

db.write(batch);

batch.close();

batch = db.createWriteBatch();

}

db.write(batch); // possible partial batch

batch.close();

}

@State(Benchmark)

public static class Reader extends CommonLevelDb {

StreamingXXHash64 xxh;

@Setup(Trial)

@Override

public void setup(final BenchmarkParams b) throws IOException {

super.setup(b);

super.write(num);

xxh = XXHashFactory.fastestJavaInstance().newStreamingHash64(0);

}

@TearDown(Trial)

@Override

public void teardown() throws IOException {

super.teardown();

}

@State(Benchmark)

public static class Writer extends CommonLevelDb {

@Param("1000000")

int batchSize;

@Setup(Invocation)

@Override

public void setup(final BenchmarkParams b) throws IOException {

super.setup(b);

}

@TearDown(Invocation)

@Override

public void teardown() throws IOException {

super.teardown();

}

benchmarks/src/main/java/org/lmdbjava/bench/LevelDb.java at master · lmdbjava/benchmarks · GitHub

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