| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.qpid.proton.codec; |
| |
| import org.apache.qpid.proton.codec.ReadableBuffer.ByteBufferReader; |
| import org.openjdk.jmh.annotations.*; |
| import org.openjdk.jmh.profile.GCProfiler; |
| 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 java.nio.ByteBuffer; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Test performance of the CompositeReadableBuffer class |
| */ |
| @State(Scope.Benchmark) |
| @BenchmarkMode(Mode.AverageTime) |
| @OutputTimeUnit(TimeUnit.NANOSECONDS) |
| @Warmup(iterations = 5, time = 1) |
| @Measurement(iterations = 5, time = 1) |
| public class CompositeReadableBufferBenchmark { |
| |
| private CompositeReadableBuffer composite; |
| @Param({"8", "64", "1024"}) |
| private int size; |
| private ReadableBuffer.ByteBufferReader bufferReader; |
| @Param({"false", "true"}) |
| private boolean direct; |
| @Param({"1", "2"}) |
| private int chunks; |
| private CompositeReadableBuffer compositePartial; |
| private ReadableBuffer bufferReaderPartial; |
| |
| @Setup |
| public void init() { |
| bufferReader = |
| direct ? ByteBufferReader.wrap(ByteBuffer.allocateDirect(size)) : ByteBufferReader.wrap(new byte[size]); |
| composite = new CompositeReadableBuffer(); |
| int sizePerChunk = size / chunks; |
| for (int i = 0; i < chunks; i++) { |
| final byte[] content = new byte[sizePerChunk]; |
| composite.append(content); |
| } |
| int remaining = size - composite.capacity(); |
| if (remaining > 0) { |
| byte[] lastChunk = new byte[remaining]; |
| composite.append(lastChunk); |
| } |
| |
| compositePartial = composite.duplicate().limit(sizePerChunk); |
| bufferReaderPartial = bufferReader.duplicate().limit(sizePerChunk); |
| } |
| |
| @Benchmark |
| public boolean equalsToByteBufferReader() { |
| composite.position(0); |
| return composite.equals(bufferReader); |
| } |
| |
| @Benchmark |
| public boolean equalsToWithSingleArraySubsetOfBuffer() { |
| compositePartial.position(0); |
| return compositePartial.equals(bufferReaderPartial); |
| } |
| |
| public static void main(String[] args) throws RunnerException { |
| runBenchmark(CompositeReadableBuffer.class); |
| } |
| |
| public static void runBenchmark(Class<?> benchmarkClass) throws RunnerException { |
| final Options opt = new OptionsBuilder() |
| .include(benchmarkClass.getSimpleName()) |
| .addProfiler(GCProfiler.class) |
| .shouldDoGC(true) |
| .warmupIterations(5) |
| .measurementIterations(5) |
| .forks(1) |
| .build(); |
| new Runner(opt).run(); |
| } |
| } |