1 /* 2 * Copyright (c) 2014 Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package org.openjdk.bench.java.nio; 26 27 import org.openjdk.jmh.annotations.Benchmark; 28 import org.openjdk.jmh.annotations.BenchmarkMode; 29 import org.openjdk.jmh.annotations.Mode; 30 import org.openjdk.jmh.annotations.OutputTimeUnit; 31 import org.openjdk.jmh.annotations.Param; 32 import org.openjdk.jmh.annotations.Scope; 33 import org.openjdk.jmh.annotations.Setup; 34 import org.openjdk.jmh.annotations.State; 35 36 import java.nio.ByteBuffer; 37 import java.nio.CharBuffer; 38 import java.nio.charset.CharacterCodingException; 39 import java.nio.charset.Charset; 40 import java.nio.charset.CharsetDecoder; 41 import java.nio.charset.CharsetEncoder; 42 import java.util.concurrent.TimeUnit; 43 44 /** 45 * This benchmark tests the encode/decode loops on different Charsets. It was created from an adhoc benchmark addressing 46 * a performance issue which in the end boiled down to the encode/decode loops. This is the reason for the values on the 47 * char and byte arrays. 48 */ 49 @BenchmarkMode(Mode.AverageTime) 50 @OutputTimeUnit(TimeUnit.MICROSECONDS) 51 @State(Scope.Thread) 52 public class CharsetEncodeDecode { 53 54 private byte[] BYTES; 55 private char[] CHARS; 56 57 private CharsetEncoder encoder; 58 private CharsetDecoder decoder; 59 60 @Param({"BIG5", "ISO-8859-15", "ASCII", "UTF-16"}) 61 private String type; 62 63 @Param("16384") 64 private int size; 65 66 @Setup 67 public void prepare() { 68 BYTES = new byte[size]; 69 CHARS = new char[size]; 70 for (int i = 0; i < size; ++i) { 71 int val = 48 + (i % 16); 72 BYTES[i] = (byte) val; 73 CHARS[i] = (char) val; 74 } 75 76 encoder = Charset.forName(type).newEncoder(); 77 decoder = Charset.forName(type).newDecoder(); 78 } 79 80 @Benchmark 81 public ByteBuffer encode() throws CharacterCodingException { 82 CharBuffer charBuffer = CharBuffer.wrap(CHARS); 83 return encoder.encode(charBuffer); 84 } 85 86 @Benchmark 87 public CharBuffer decode() throws CharacterCodingException { 88 ByteBuffer byteBuffer = ByteBuffer.wrap(BYTES); 89 return decoder.decode(byteBuffer); 90 } 91 92 }