1 /*

     2  * Copyright (c) 2018, 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;

    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.Arrays;

    37 import java.util.concurrent.TimeUnit;

    38 

    39 @BenchmarkMode(Mode.AverageTime)

    40 @OutputTimeUnit(TimeUnit.NANOSECONDS)

    41 @State(Scope.Thread)

    42 public class ArraysFill {

    43 

    44     @Param({"10", "266", "2048"})

    45     public int size;

    46 

    47     public byte[] testByteArray;

    48     public char[] testCharArray;

    49     public short[] testShortArray;

    50     public int[] testIntArray;

    51     public long[] testLongArray;

    52     public float[] testFloatArray;

    53     public double[] testDoubleArray;

    54 

    55     @Setup

    56     public void setup() {

    57         testByteArray = new byte[size];

    58         testCharArray = new char[size];

    59         testShortArray = new short[size];

    60         testIntArray = new int[size];

    61         testLongArray = new long[size];

    62         testFloatArray = new float[size];

    63         testDoubleArray = new double[size];

    64 

    65     }

    66 

    67     @Benchmark

    68     @Warmup(iterations = 3)

    69     @Measurement(iterations = 3)

    70     public void testCharFill() {

    71         Arrays.fill(testCharArray, (char) -1);

    72     }

    73 

    74     @Benchmark

    75     @Warmup(iterations = 3)

    76     @Measurement(iterations = 3)

    77     public void testByteFill() {

    78         Arrays.fill(testByteArray, (byte) -1);

    79     }

    80 

    81     @Benchmark

    82     @Warmup(iterations = 3)

    83     @Measurement(iterations = 3)

    84     public void testShortFill() {

    85         Arrays.fill(testShortArray, (short) -1);

    86     }

    87 

    88     @Benchmark

    89     @Warmup(iterations = 3)

    90     @Measurement(iterations = 3)

    91     public void testIntFill() {

    92         Arrays.fill(testIntArray, -1);

    93     }

    94 

    95     @Benchmark

    96     @Warmup(iterations = 3)

    97     @Measurement(iterations = 3)

    98     public void testLongFill() {

    99         Arrays.fill(testLongArray, -1);

   100     }

   101 

   102     @Benchmark

   103     @Warmup(iterations = 3)

   104     @Measurement(iterations = 3)

   105     public void testFloatFill() {

   106         Arrays.fill(testFloatArray, (float) -1.0);

   107     }

   108 

   109     @Benchmark

   110     @Warmup(iterations = 3)

   111     @Measurement(iterations = 3)

   112     public void testDoubleFill() {

   113         Arrays.fill(testDoubleArray, -1.0);

   114     }

   115 }