1 /* 2 * Copyright (c) 2019, 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.util.regex; 24 25 import org.openjdk.jmh.annotations.Benchmark; 26 import org.openjdk.jmh.annotations.BenchmarkMode; 27 import org.openjdk.jmh.annotations.Measurement; 28 import org.openjdk.jmh.annotations.Mode; 29 import org.openjdk.jmh.annotations.OutputTimeUnit; 30 import org.openjdk.jmh.annotations.Param; 31 import org.openjdk.jmh.annotations.Scope; 32 import org.openjdk.jmh.annotations.Setup; 33 import org.openjdk.jmh.annotations.State; 34 import org.openjdk.jmh.annotations.Warmup; 35 36 import java.util.concurrent.TimeUnit; 37 import java.util.regex.Pattern; 38 import java.util.regex.PatternSyntaxException; 39 40 @BenchmarkMode(Mode.AverageTime) 41 @OutputTimeUnit(TimeUnit.NANOSECONDS) 42 @State(Scope.Thread) 43 public class PatternBench { 44 45 public String fileTestString; 46 public String flagsString; 47 48 49 public Pattern graphemePattern; 50 public Pattern jmodPattern; 51 public Pattern jmodCanonicalPattern; 52 53 public Pattern pattern; 54 55 @Setup 56 public void setup() { 57 flagsString = "\ud83c\udde6\ud83c\uddec\ud83c\uddec\ud83c\udde6\ud83c\uddfa\ud83c\uddf8\ud83c\uddeb\ud83c\uddf7"; 58 fileTestString = "META-INF/providers/org.openjdk.foo_hotspot_nodes_PluginFactory_EndLockScopeNode"; 59 graphemePattern = Pattern.compile("\\b{g}"); 60 jmodCanonicalPattern = Pattern.compile("^.*(?:(?:_the\\.[^/]*)|(?:_[^/]*\\.marker)|(?:[^/]*\\.diz)|(?:[^/]*\\.debuginfo)|(?:[^/]*\\.dSYM/.*)|(?:[^/]*\\.dSYM)|(?:[^/]*\\.pdb)|(?:[^/]*\\.map))$", Pattern.CANON_EQ); 61 jmodPattern = Pattern.compile("^.*(?:(?:_the\\.[^/]*)|(?:_[^/]*\\.marker)|(?:[^/]*\\.diz)|(?:[^/]*\\.debuginfo)|(?:[^/]*\\.dSYM/.*)|(?:[^/]*\\.dSYM)|(?:[^/]*\\.pdb)|(?:[^/]*\\.map))$"); 62 } 63 64 @Benchmark 65 @Warmup(iterations = 3) 66 @Measurement(iterations = 3) 67 public int splitFlags() { 68 return graphemePattern.split(flagsString).length; 69 } 70 71 @Benchmark 72 @Warmup(iterations = 3) 73 @Measurement(iterations = 3) 74 public boolean canonicalJmodMatch() { 75 return jmodCanonicalPattern.matcher(fileTestString).matches(); 76 } 77 78 @Benchmark 79 @Warmup(iterations = 3) 80 @Measurement(iterations = 3) 81 public boolean normalJmodMatch() { 82 return jmodPattern.matcher(fileTestString).matches(); 83 } 84 }