151 lines
4.5 KiB
Java
151 lines
4.5 KiB
Java
/*
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* Copyright (c) 2018, 2023, 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.lang;
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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.Level;
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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.util.Random;
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import java.util.concurrent.TimeUnit;
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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@State(Scope.Thread)
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@Warmup(iterations = 5, time = 1)
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@Measurement(iterations = 5, time = 1)
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@Fork(3)
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public class Characters {
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@Param({"9", "65", "97", "223", "430"})
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private int codePoint;
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@Param("500")
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private int size;
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private char[] chars;
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private char[] res;
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@Setup
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public void setup() {
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Random r = new Random(0);
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chars = new char[size];
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res = new char[size];
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for (int i = 0; i < size; i++) {
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chars[i] = (char)r.nextInt(Character.MAX_VALUE + 1);
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}
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}
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@Benchmark
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public void reverseBytes() {
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for (int i = 0; i < size; i++) {
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res[i] = Character.reverseBytes(chars[i]);
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}
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}
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@Benchmark
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public boolean isDigit() {
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return Character.isDigit(codePoint);
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}
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@Benchmark
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public boolean isLowerCase() {
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return Character.isLowerCase(codePoint);
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}
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@Benchmark
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public boolean isUpperCase() {
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return Character.isUpperCase(codePoint);
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}
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@Benchmark
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public boolean isWhitespace() {
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return Character.isWhitespace(codePoint);
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}
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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@Warmup(iterations = 5, time = 1)
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@Measurement(iterations = 5, time = 1)
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@Fork(3)
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public static class CodePoints {
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@Benchmark
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public void codePointOf() {
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Character.codePointOf("Latin Capital Letter B with hook");
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}
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}
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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@State(Scope.Thread)
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@Warmup(iterations = 5, time = 1)
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@Measurement(iterations = 5, time = 1)
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@Fork(3)
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public static class CaseConversions {
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@Param({
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"low", // 0x09 pre A
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"A", // 0x41 uppercase A
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"a", // 0x61 lowercase a
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"A-grave", // 0xC0 uppercase A-grave
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"a-grave", // 0xE0 lowercase a-grave
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"micro", // 0xB5 lowercase 'Micro Sign'
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"yD" // 0xFF lowercase 'y with Diaeresis'
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})
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private String codePoint;
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private int cp;
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@Setup(Level.Trial)
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public void setup() {
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cp = switch (codePoint) {
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case "low" -> 0x09;
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case "A" -> 0x41;
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case "a" -> 0x61;
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case "A-grave" -> 0xC0;
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case "a-grave" -> 0xE0;
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case "yD" -> 0xE0;
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case "micro" -> 0xFF;
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default -> Integer.parseInt(codePoint);
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};
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}
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@Benchmark
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public int toUpperCase() {
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return Character.toUpperCase(cp);
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}
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@Benchmark
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public int toLowerCase() {
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return Character.toLowerCase(cp);
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}
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}
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}
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