| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.cassandra.test.microbench; |
| |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| import java.util.Random; |
| import java.util.concurrent.TimeUnit; |
| |
| import com.google.common.hash.Hasher; |
| import com.google.common.hash.Hashing; |
| |
| 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.Threads; |
| import org.openjdk.jmh.annotations.Warmup; |
| |
| @BenchmarkMode(Mode.AverageTime) |
| @OutputTimeUnit(TimeUnit.NANOSECONDS) |
| @Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS) |
| @Measurement(iterations = 5, time = 2, timeUnit = TimeUnit.SECONDS) |
| @Fork(value = 1, jvmArgsAppend = { "-Xmx512M", "-Djmh.executor=CUSTOM", "-Djmh.executor.class=org.apache.cassandra.test.microbench.FastThreadExecutor"}) |
| @Threads(4) // make sure this matches the number of _physical_cores_ |
| @State(Scope.Benchmark) |
| public class HashingBench |
| { |
| private static final Random random = new Random(12345678); |
| |
| private static final MessageDigest messageDigest; |
| static |
| { |
| try |
| { |
| messageDigest = MessageDigest.getInstance("MD5"); |
| } |
| catch (NoSuchAlgorithmException nsae) |
| { |
| throw new RuntimeException("MD5 digest algorithm is not available", nsae); |
| } |
| } |
| |
| |
| // intentionally not on power-of-2 values |
| @Param({ "31", "131", "517", "2041" }) |
| private int bufferSize; |
| |
| private byte[] array; |
| |
| @Setup |
| public void setup() throws NoSuchAlgorithmException |
| { |
| array = new byte[bufferSize]; |
| random.nextBytes(array); |
| } |
| |
| @Benchmark |
| public byte[] benchMessageDigestMD5() |
| { |
| try |
| { |
| MessageDigest clone = (MessageDigest) messageDigest.clone(); |
| clone.update(array); |
| return clone.digest(); |
| } |
| catch (CloneNotSupportedException e) |
| { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Benchmark |
| public byte[] benchHasherMD5() |
| { |
| Hasher md5Hasher = Hashing.md5().newHasher(); |
| md5Hasher.putBytes(array); |
| return md5Hasher.hash().asBytes(); |
| } |
| |
| @Benchmark |
| public byte[] benchHasherMurmur3_128() |
| { |
| Hasher murmur3_128Hasher = Hashing.murmur3_128().newHasher(); |
| murmur3_128Hasher.putBytes(array); |
| return murmur3_128Hasher.hash().asBytes(); |
| } |
| } |