testing/performance/talos/page_load_test/sunspider/bitops-nsieve-bits.html

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  27
  28 <title>SunSpider bitops-nsieve-bits</title>
  29 <link rel="stylesheet" href="sunspider.css"></link>
  30 </head>
  31
  32 <body>
  33 <h3>bitops-nsieve-bits</h3>
  34 <div id="console">
  35 </div>
  36 <script>
  37
  38
  39 // The Great Computer Language Shootout
  40 //  http://shootout.alioth.debian.org
  41 //
  42 //  Contributed by Ian Osgood
  43
  44 function pad(n,width) {
  45   var s = n.toString();
  46   while (s.length < width) s = ' ' + s;
  47   return s;
  48 }
  49
  50 function primes(isPrime, n) {
  51   var i, count = 0, m = 10000<<n, size = m+31>>5;
  52
  53   for (i=0; i<size; i++) isPrime[i] = 0xffffffff;
  54
  55   for (i=2; i<m; i++)
  56     if (isPrime[i>>5] & 1<<(i&31)) {
  57       for (var j=i+i; j<m; j+=i)
  58         isPrime[j>>5] &= ~(1<<(j&31));
  59       count++;
  60     }
  61 }
  62
  63 function sieve() {
  64     for (var i = 4; i <= 4; i++) {
  65         var isPrime = new Array((10000<<i)+31>>5);
  66         primes(isPrime, i);
  67     }
  68 }
  69
  70 sieve();
  71
  72
  73
  74 </script>
  75
  76
  77 </body>
  78 </html>