regexp cache.js

// you can run it at http://bga.github.com/speedtest/

var _fn = (function()
{
  var re = /\d/;

  return function(s)
  {
    re.test(s);  
  };
})();  

var _fn2 = function(s)
{
  /\d/.test(s);  
};  

_speedTest(
  [
    function(n)
    {
      var i = n; while(i--)
      {
        _fn('123');
      }    
    },
    function(n)
    {
      var i = n; while(i--)
      {
        _fn2('123');
      }    
    }
  ],
  400000
);

/*
ff3.6
0: 703 ms
1: 756 ms

chrome5 n*=10
0: 617 ms
1: 613 ms

ie7
0: 4967 ms
1: 7190 ms

opera10.60 n*=10
0: 1269 ms
1: 1316 ms
*/