| /* |
| * Copyright (C) 2018 Square, Inc. and others. |
| * |
| * 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 com.squareup.okio.benchmarks; |
| |
| import java.io.IOException; |
| import java.util.concurrent.TimeUnit; |
| import okio.Buffer; |
| import org.openjdk.jmh.Main; |
| 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.Warmup; |
| import org.openjdk.jmh.runner.RunnerException; |
| |
| @Fork(1) |
| @Warmup(iterations = 5, time = 2) |
| @Measurement(iterations = 5, time = 2) |
| @State(Scope.Benchmark) |
| @BenchmarkMode(Mode.SampleTime) |
| @OutputTimeUnit(TimeUnit.MICROSECONDS) |
| public class BufferCursorSeekBenchmark { |
| Buffer buffer; |
| Buffer.UnsafeCursor cursor; |
| |
| @Param({ "2097152" }) |
| int bufferSize; // 2 MB = 256 Segments |
| |
| @Setup |
| public void setup() throws IOException { |
| byte[] source = new byte[8192]; |
| buffer = new Buffer(); |
| while (buffer.size() < bufferSize) { |
| buffer.write(source); |
| } |
| cursor = new Buffer.UnsafeCursor(); |
| } |
| |
| @Benchmark |
| public void seekBeginning() { |
| buffer.readUnsafe(cursor); |
| try { |
| cursor.seek(0); |
| } finally { |
| cursor.close(); |
| } |
| } |
| |
| @Benchmark |
| public void seekEnd() { |
| buffer.readUnsafe(cursor); |
| try { |
| cursor.seek(buffer.size() - 1); |
| } finally { |
| cursor.close(); |
| } |
| } |
| |
| @Benchmark |
| public void seekForward() { |
| buffer.readUnsafe(cursor); |
| try { |
| cursor.seek(0); |
| cursor.seek(1); |
| } finally { |
| cursor.close(); |
| } |
| } |
| |
| @Benchmark |
| public void seekBackward() { |
| buffer.readUnsafe(cursor); |
| try { |
| cursor.seek(buffer.size() - 1); |
| cursor.seek(buffer.size() - 2); |
| } finally { |
| cursor.close(); |
| } |
| } |
| |
| public static void main(String[] args) throws IOException, RunnerException { |
| Main.main(new String[] { |
| BufferCursorSeekBenchmark.class.getName() |
| }); |
| } |
| } |