|
1 <!DOCTYPE html> |
|
2 <head> |
|
3 <!-- |
|
4 Copyright (C) 2007 Apple Inc. All rights reserved. |
|
5 |
|
6 Redistribution and use in source and binary forms, with or without |
|
7 modification, are permitted provided that the following conditions |
|
8 are met: |
|
9 1. Redistributions of source code must retain the above copyright |
|
10 notice, this list of conditions and the following disclaimer. |
|
11 2. 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 THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
|
16 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
|
17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
|
18 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
|
19 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
|
20 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
|
21 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
|
22 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
|
23 OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
|
24 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
|
25 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
|
26 --> |
|
27 |
|
28 <title>SunSpider access-binary-trees</title> |
|
29 |
|
30 </head> |
|
31 |
|
32 <body> |
|
33 <h3>access-binary-trees</h3> |
|
34 <div id="console"> |
|
35 </div> |
|
36 |
|
37 <script> |
|
38 |
|
39 var _sunSpiderStartDate = new Date(); |
|
40 |
|
41 /* The Great Computer Language Shootout |
|
42 http://shootout.alioth.debian.org/ |
|
43 contributed by Isaac Gouy */ |
|
44 |
|
45 function TreeNode(left,right,item){ |
|
46 this.left = left; |
|
47 this.right = right; |
|
48 this.item = item; |
|
49 } |
|
50 |
|
51 TreeNode.prototype.itemCheck = function(){ |
|
52 if (this.left==null) return this.item; |
|
53 else return this.item + this.left.itemCheck() - this.right.itemCheck(); |
|
54 } |
|
55 |
|
56 function bottomUpTree(item,depth){ |
|
57 if (depth>0){ |
|
58 return new TreeNode( |
|
59 bottomUpTree(2*item-1, depth-1) |
|
60 ,bottomUpTree(2*item, depth-1) |
|
61 ,item |
|
62 ); |
|
63 } |
|
64 else { |
|
65 return new TreeNode(null,null,item); |
|
66 } |
|
67 } |
|
68 |
|
69 var ret; |
|
70 |
|
71 for ( var n = 4; n <= 7; n += 1 ) { |
|
72 var minDepth = 4; |
|
73 var maxDepth = Math.max(minDepth + 2, n); |
|
74 var stretchDepth = maxDepth + 1; |
|
75 |
|
76 var check = bottomUpTree(0,stretchDepth).itemCheck(); |
|
77 |
|
78 var longLivedTree = bottomUpTree(0,maxDepth); |
|
79 for (var depth=minDepth; depth<=maxDepth; depth+=2){ |
|
80 var iterations = 1 << (maxDepth - depth + minDepth); |
|
81 |
|
82 check = 0; |
|
83 for (var i=1; i<=iterations; i++){ |
|
84 check += bottomUpTree(i,depth).itemCheck(); |
|
85 check += bottomUpTree(-i,depth).itemCheck(); |
|
86 } |
|
87 } |
|
88 |
|
89 ret = longLivedTree.itemCheck(); |
|
90 } |
|
91 |
|
92 |
|
93 var _sunSpiderInterval = new Date() - _sunSpiderStartDate; |
|
94 |
|
95 document.getElementById("console").innerHTML = _sunSpiderInterval; |
|
96 </script> |
|
97 |
|
98 |
|
99 </body> |
|
100 </html> |