1 /*

     2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  *

     8  *   - Redistributions of source code must retain the above copyright

     9  *     notice, this list of conditions and the following disclaimer.

    10  *

    11  *   - Redistributions in binary form must reproduce the above copyright

    12  *     notice, this list of conditions and the following disclaimer in the

    13  *     documentation and/or other materials provided with the distribution.

    14  *

    15  *   - Neither the name of Oracle nor the names of its

    16  *     contributors may be used to endorse or promote products derived

    17  *     from this software without specific prior written permission.

    18  *

    19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

    20  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

    21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR

    23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    26  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

    27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

    28  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

    29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    30  */

    31 

    32 /*

    33  * A micro-benchmark for getters and setters with primitive values,

    34  * alternating between ints and doubles. Introduction of primitive

    35  * and optimistic user accessors in JDK-8062401 make this faster by

    36  * 10x or more by allowing inlining and other optimizations to take place.

    37  */

    38 

    39 var x = {

    40     get m() {

    41         return this._m;

    42     },

    43     set m(v) {

    44         this._m = v;

    45     },

    46     get n() {

    47         return this._n;

    48     },

    49     set n(v) {

    50         this._n = v;

    51     }

    52 };

    53 

    54 

    55 function bench(v1, v2, result) {

    56     var start = Date.now();

    57     x.n = v1;

    58     for (var i = 0; i < 1e8; i++) {

    59         x.m = v2;

    60         if (x.m + x.n !== result) {

    61             throw "wrong result";

    62         }

    63     }

    64     print("done in", Date.now() - start, "millis");

    65 }

    66 

    67 for (var i = 0; i < 10; i++) {

    68     bench(i, 4, 4 + i);

    69 }

    70 

    71 for (var i = 0; i < 10; i++) {

    72     bench(i, 4.5, 4.5 + i);

    73 }

    74 

    75 for (var i = 0; i < 10; i++) {

    76     bench(i, 5, 5 + i);

    77 }

    78 

    79 for (var i = 0; i < 10; i++) {

    80     bench(i, 5.5, 5.5 + i);

    81 }