1 /*
   2  * Copyright (c) 2010, 2013, 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 
  34 function bench(name, func) {
  35     var start = Date.now();
  36     for (var iter = 0; iter < 5e6; iter++) {
  37         func();
  38     }
  39     print((Date.now() - start) + "\t" + name);
  40 }
  41 
  42 bench("[]", function() {
  43     [];
  44     [];
  45     [];
  46 });
  47 
  48 bench("[1, 2, 3]", function() {
  49     [1, 2, 3];
  50     [1, 2, 3];
  51     [1, 2, 3];
  52 });
  53 
  54 bench("[1 .. 20]", function() {
  55     [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20];
  56     [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20];
  57     [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20];
  58 });
  59 
  60 bench("new Array()", function() {
  61     new Array();
  62     new Array();
  63     new Array();
  64 });
  65 
  66 
  67 bench("new Array(1, 2, 3)", function() {
  68     new Array(1, 2, 3);
  69     new Array(1, 2, 3);
  70     new Array(1, 2, 3);
  71 });
  72 
  73 bench("new Array(10)", function() {
  74     new Array(10);
  75     new Array(10);
  76     new Array(10);
  77 });
  78 
  79 var array = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
  80 
  81 bench("get", function() {
  82     array[0];
  83     array[3];
  84     array[6];
  85 });
  86 
  87 bench("set", function() {
  88     array[0] = 0;
  89     array[3] = 3;
  90     array[6] = 6;
  91 });
  92 
  93 bench("push", function() {
  94     var arr = [1, 2, 3];
  95     arr.push(4);
  96     arr.push(5);
  97     arr.push(6);
  98 });
  99 
 100 bench("pop", function() {
 101     var arr = [1, 2, 3];
 102     arr.pop();
 103     arr.pop();
 104     arr.pop();
 105 });
 106 
 107 bench("splice", function() {
 108     [1, 2, 3].splice(0, 2, 5, 6, 7);
 109 });
 110 
 111 var all = function(e) { return true; };
 112 var none = function(e) { return false; };
 113 
 114 bench("filter all", function() {
 115     array.filter(all);
 116 });
 117 
 118 bench("filter none", function() {
 119     array.filter(none);
 120 });
 121 
 122 var up = function(a, b) { return a > b ? 1 : -1; };
 123 var down = function(a, b) { return a < b ? 1 : -1; };
 124 
 125 bench("sort up", function() {
 126     [1, 2, 3, 4].sort(up);
 127 });
 128 
 129 bench("sort down", function() {
 130     [1, 2, 3, 4].sort(down);
 131 });
 132