Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    function factorial(n) {
      if (n < 1) return 1
      else return n * factorial(n - 1)
    }
    
    function factorial2(n) {
      factorial2.cache = factorial2.cache || [1] 
      return factorial2.cache[n] || (factorial2.cache[n] = n * factorial2(n - 1))
    }
    
    function factorial3(n) {
      var res = 1;
      for (var i = 2; i <= n; ++i)
      res = res * i;
      return res;
    }
    
    var n
  };
</script>

Test runner

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n = Math.floor(Math.random() * 170);
factorial(n)

n = Math.floor(Math.random() * 170);
factorial2(n)

n = Math.floor(Math.random() * 170);
factorial3(n)

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by Yehor Lvivski on 18th September 2012
• Revision 2: published by zaus on 25th October 2012
• Revision 3: published on 17th February 2013
• Revision 4: published by Inskandar Hamadrias on 9th April 2013

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