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