97 lines
3.3 KiB
Java
97 lines
3.3 KiB
Java
/*
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* Copyright (c) 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.*;
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import java.util.concurrent.TimeUnit;
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/*
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* This benchmark naively explores String::regionMatches, ignoring case
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*/
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public class RegionMatchesIC {
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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@State(Scope.Benchmark)
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@Warmup(iterations = 5, time = 1)
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@Measurement(iterations = 5, time = 1)
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@Fork(value = 3)
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public static class Latin1 {
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@Param({"1024"})
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public int size;
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@Param({"ascii-match",
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"ascii-mismatch",
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"number-match",
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"number-mismatch",
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"lat1-match",
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"lat1-mismatch"})
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String codePoints;
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private String leftString;
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private String rightString;
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@Setup
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public void setup() {
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switch (codePoints) {
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case "ascii-match" -> {
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leftString = "a".repeat(size);
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rightString = "A".repeat(size);
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}
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case "ascii-mismatch" -> {
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leftString = "a".repeat(size);
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rightString = "b".repeat(size);
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}
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case "number-match" -> {
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leftString = "7".repeat(size);
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rightString = "7".repeat(size);
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}
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case "number-mismatch" -> {
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leftString = "7".repeat(size);
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rightString = "9".repeat(size);
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}
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case "lat1-match" -> {
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leftString = "\u00e5".repeat(size);
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rightString = "\u00c5".repeat(size);
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}
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case "lat1-mismatch" -> {
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leftString = "\u00e5".repeat(size);
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rightString = "\u00c6".repeat(size);
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}
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default -> throw new IllegalArgumentException("Unsupported coding: " + codePoints);
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}
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// Make sure strings do not String.equals by adding a prefix
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leftString = "l" + leftString;
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rightString = "r" + rightString;
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}
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@Benchmark
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public boolean regionMatchesIC() {
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return leftString.regionMatches(true, 1, rightString, 1, size);
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}
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}
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}
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