testing/performance/talos/page_load_test/jss/real-fannkuch-4.html

   1 <html><head>
   2 <!-- MOZ_INSERT_CONTENT_HOOK -->
   3 <script src = runner.js></script>
   4 <script>
   5 var onlyName = 'Pfannkuchen', onlyNum = 8;
   6 function thisTest() {
   7
   8 /* The Great Computer Language Shootout
   9    http://shootout.alioth.debian.org/
  10    contributed by Isaac Gouy */
  11
  12 function fannkuch(n) {
  13    var check = 0;
  14    var perm = Array(n);
  15    var perm1 = Array(n);
  16    var count = Array(n);
  17    var maxPerm = Array(n);
  18    var maxFlipsCount = 0;
  19    var m = n - 1;
  20
  21    for (var i = 0; i < n; i++) perm1[i] = i;
  22    var r = n;
  23
  24    while (true) {
  25       // write-out the first 30 permutations
  26       if (check < 30){
  27          var s = "";
  28          for(var i=0; i<n; i++) s += (perm1[i]+1).toString();
  29          check++;
  30       }
  31
  32       while (r != 1) { count[r - 1] = r; r--; }
  33       if (!(perm1[0] == 0 || perm1[m] == m)) {
  34          for (var i = 0; i < n; i++) perm[i] = perm1[i];
  35
  36          var flipsCount = 0;
  37          var k;
  38
  39          while (!((k = perm[0]) == 0)) {
  40             var k2 = (k + 1) >> 1;
  41             for (var i = 0; i < k2; i++) {
  42                var temp = perm[i]; perm[i] = perm[k - i]; perm[k - i] = temp;
  43             }
  44             flipsCount++;
  45          }
  46
  47          if (flipsCount > maxFlipsCount) {
  48             maxFlipsCount = flipsCount;
  49             for (var i = 0; i < n; i++) maxPerm[i] = perm1[i];
  50          }
  51       }
  52
  53       while (true) {
  54          if (r == n) return maxFlipsCount;
  55          var perm0 = perm1[0];
  56          var i = 0;
  57          while (i < r) {
  58             var j = i + 1;
  59             perm1[i] = perm1[j];
  60             i = j;
  61          }
  62          perm1[r] = perm0;
  63
  64          count[r] = count[r] - 1;
  65          if (count[r] > 0) break;
  66          r++;
  67       }
  68    }
  69 }
  70
  71 startTest("real-fannkuch");
  72
  73 var ret;
  74
  75 for ( var n = 5; n <= 8; n++ ) (function(n){
  76         test( "Pfannkuchen", n, function(){
  77                 ret = fannkuch(n);
  78         });
  79 })(n);
  80
  81 endTest();
  82 }
  83 </script>
  84 <body onload="thisTest()"></body></html>