1 /*
   2  * Copyright (c) 2014 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package org.openjdk.bench.java.util;
  26 
  27 import org.openjdk.jmh.annotations.Benchmark;
  28 import org.openjdk.jmh.annotations.BenchmarkMode;
  29 import org.openjdk.jmh.annotations.Mode;
  30 import org.openjdk.jmh.annotations.OutputTimeUnit;
  31 import org.openjdk.jmh.annotations.Scope;
  32 import org.openjdk.jmh.annotations.State;
  33 
  34 import java.util.Arrays;
  35 import java.util.concurrent.TimeUnit;
  36 
  37 /**
  38  * Tests for Array.equals() with 80 entry arrays differing at beginning, middle, or end.
  39  */
  40 @BenchmarkMode(Mode.AverageTime)
  41 @OutputTimeUnit(TimeUnit.NANOSECONDS)
  42 @State(Scope.Thread)
  43 public class ArraysEquals {
  44 
  45     public char[] testCharArray1 = "1234567890123456789012345678901234567890123456789012345678901234567890123456789a".toCharArray();
  46     public char[] testCharArray2 = "1234567890123456789012345678901234567890123456789012345678901234567890123456789b".toCharArray();
  47     public char[] testCharArray3 = "123456789012345678901234567890123456789a123456789012345678901234567890123456789b".toCharArray();
  48     public char[] testCharArray4 = "1234567890a2345678901234567890123456789a123456789012345678901234567890123456789b".toCharArray();
  49     public char[] testCharArray5 = "1234567890123456789012345678901234567890123456789012345678901234567890123456789a".toCharArray();
  50     public byte[] testByteArray1 = "1234567890123456789012345678901234567890123456789012345678901234567890123456789a".getBytes();
  51     public byte[] testByteArray2 = "1234567890123456789012345678901234567890123456789012345678901234567890123456789b".getBytes();
  52     public byte[] testByteArray3 = "123456789012345678901234567890123456789a123456789012345678901234567890123456789b".getBytes();
  53     public byte[] testByteArray4 = "1234567890a2345678901234567890123456789a123456789012345678901234567890123456789b".getBytes();
  54     public byte[] testByteArray5 = "1234567890123456789012345678901234567890123456789012345678901234567890123456789a".getBytes();
  55 
  56     /** Char array tests */
  57 
  58     @Benchmark
  59     public boolean testCharTrue() {
  60         return Arrays.equals(testCharArray1, testCharArray5);
  61     }
  62 
  63     @Benchmark
  64     public boolean testCharFalseEnd() {
  65         return Arrays.equals(testCharArray1, testCharArray2);
  66     }
  67 
  68     @Benchmark
  69     public boolean testCharFalseMid() {
  70         return Arrays.equals(testCharArray1, testCharArray3);
  71     }
  72 
  73     @Benchmark
  74     public boolean testCharFalseBeginning() {
  75         return Arrays.equals(testCharArray1, testCharArray4);
  76     }
  77 
  78     /** Byte arrays tests */
  79     @Benchmark
  80     public boolean testByteTrue() {
  81         return Arrays.equals(testByteArray1, testByteArray5);
  82     }
  83 
  84     @Benchmark
  85     public boolean testByteFalseEnd() {
  86         return Arrays.equals(testByteArray1, testByteArray2);
  87     }
  88 
  89     @Benchmark
  90     public boolean testByteFalseMid() {
  91         return Arrays.equals(testByteArray1, testByteArray3);
  92     }
  93 
  94     @Benchmark
  95     public boolean testByteFalseBeginning() {
  96         return Arrays.equals(testByteArray1, testByteArray4);
  97     }
  98 }