math-partial-sums.html (2402B)
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 math-partial-sums</title> 29 30 </head> 31 32 <body> 33 <h3>math-partial-sums</h3> 34 <div id="console"> 35 </div> 36 37 <script> 38 39 var _sunSpiderStartDate = new Date(); 40 41 // The Computer Language Shootout 42 // http://shootout.alioth.debian.org/ 43 // contributed by Isaac Gouy 44 45 function partial(n){ 46 var a1 = a2 = a3 = a4 = a5 = a6 = a7 = a8 = a9 = 0.0; 47 var twothirds = 2.0/3.0; 48 var alt = -1.0; 49 var k2 = k3 = sk = ck = 0.0; 50 51 for (var k = 1; k <= n; k++){ 52 k2 = k*k; 53 k3 = k2*k; 54 sk = Math.sin(k); 55 ck = Math.cos(k); 56 alt = -alt; 57 58 a1 += Math.pow(twothirds,k-1); 59 a2 += Math.pow(k,-0.5); 60 a3 += 1.0/(k*(k+1.0)); 61 a4 += 1.0/(k3 * sk*sk); 62 a5 += 1.0/(k3 * ck*ck); 63 a6 += 1.0/k; 64 a7 += 1.0/k2; 65 a8 += alt/k; 66 a9 += alt/(2*k -1); 67 } 68 } 69 70 for (var i = 1024; i <= 16384; i *= 2) { 71 partial(i); 72 } 73 74 75 76 var _sunSpiderInterval = new Date() - _sunSpiderStartDate; 77 78 document.getElementById("console").innerHTML = _sunSpiderInterval; 79 </script> 80 81 82 </body> 83 </html>