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 

    61         String jmodRegex = "^.*(?:(?:_the\\.[^/]*)|(?:_[^/]*\\.marker)|(?:[^/]*\\.diz)|(?:[^/]*\\.debuginfo)|(?:[^/]*\\.dSYM/.*)|(?:[^/]*\\.dSYM)|(?:[^/]*\\.pdb)|(?:[^/]*\\.map))$";

    62         jmodCanonicalPattern = Pattern.compile(jmodRegex, Pattern.CANON_EQ);

    63         jmodPattern = Pattern.compile(jmodRegex);

    64     }

    65 

    66     @Benchmark

    67     @Warmup(iterations = 3)

    68     @Measurement(iterations = 3)

    69     public int splitFlags() {

    70         return graphemePattern.split(flagsString).length;

    71     }

    72 

    73     @Benchmark

    74     @Warmup(iterations = 3)

    75     @Measurement(iterations = 3)

    76     public boolean canonicalJmodMatch() {

    77         return jmodCanonicalPattern.matcher(fileTestString).matches();

    78     }

    79 

    80     @Benchmark

    81     @Warmup(iterations = 3)

    82     @Measurement(iterations = 3)

    83     public boolean normalJmodMatch() {

    84         return jmodPattern.matcher(fileTestString).matches();

    85     }

    86 }