97 lines
3.3 KiB
Java
97 lines
3.3 KiB
Java
/*
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* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.openjdk.bench.java.nio;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.BenchmarkMode;
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import org.openjdk.jmh.annotations.Fork;
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import org.openjdk.jmh.annotations.Measurement;
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import org.openjdk.jmh.annotations.Mode;
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import org.openjdk.jmh.annotations.OutputTimeUnit;
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import org.openjdk.jmh.annotations.Param;
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import org.openjdk.jmh.annotations.Scope;
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import org.openjdk.jmh.annotations.Setup;
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import org.openjdk.jmh.annotations.State;
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import org.openjdk.jmh.annotations.Warmup;
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import java.nio.ByteBuffer;
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import java.nio.CharBuffer;
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import java.nio.charset.CharacterCodingException;
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import java.nio.charset.Charset;
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import java.nio.charset.CharsetDecoder;
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import java.nio.charset.CharsetEncoder;
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import java.util.concurrent.TimeUnit;
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/**
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* This benchmark tests the encode/decode loops on different Charsets. It was created from an adhoc benchmark addressing
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* a performance issue which in the end boiled down to the encode/decode loops. This is the reason for the values on the
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* char and byte arrays.
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*/
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@BenchmarkMode(Mode.AverageTime)
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@Warmup(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
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@Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
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@OutputTimeUnit(TimeUnit.MICROSECONDS)
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@State(Scope.Thread)
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@Fork(3)
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public class CharsetEncodeDecode {
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private byte[] BYTES;
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private char[] CHARS;
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private CharsetEncoder encoder;
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private CharsetDecoder decoder;
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@Param({"UTF-8", "BIG5", "ISO-8859-15", "ISO-8859-1", "ASCII", "UTF-16"})
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private String type;
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@Param("16384")
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private int size;
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@Setup
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public void prepare() {
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BYTES = new byte[size];
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CHARS = new char[size];
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for (int i = 0; i < size; ++i) {
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int val = 48 + (i % 16);
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BYTES[i] = (byte) val;
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CHARS[i] = (char) val;
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}
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encoder = Charset.forName(type).newEncoder();
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decoder = Charset.forName(type).newDecoder();
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}
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@Benchmark
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public ByteBuffer encode() throws CharacterCodingException {
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CharBuffer charBuffer = CharBuffer.wrap(CHARS);
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return encoder.encode(charBuffer);
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}
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@Benchmark
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public CharBuffer decode() throws CharacterCodingException {
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ByteBuffer byteBuffer = ByteBuffer.wrap(BYTES);
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return decoder.decode(byteBuffer);
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}
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}
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