Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    function randomString1 (strLength, charSet) {
      var result = [];
    
      strLength = strLength || 5;
      charSet = charSet || 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
    
      while (strLength--) {
        result.push(charSet.charAt(Math.floor(Math.random() * charSet.length)));
      }
    
      return result.join('');
    }
    
    function randomString2 (strLength, charSet) {
      var result = [];
    
      strLength = strLength || 5;
      charSet = charSet || ['A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','0','1','2','3','4','5','6','7','8','9'];
    
      while (strLength--) {
        result.push(charSet[Math.floor(Math.random() * charSet.length)]);
      }
    
      return result.join('');
    }
    
    function randomString3 (strLength, charSet) {
      var result = [];
    
      strLength = strLength || 5;
      charSet = charSet || 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
    
      while (--strLength) {
        result.push(charSet.charAt(Math.floor(Math.random() * charSet.length)));
      }
    
      return result.join('');
    }
    
    function randomString4 (strLength, charSet) {
        var result = [];
        
        strLength = strLength || 5;
        charSet = charSet || 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
        charSet = charSet.split();
        
        while (--strLength) {
                result.push(charSet[Math.floor(Math.random() * charSet.length)]);
        }
        
        return result.join('');
    }
  };
</script>

Test runner

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randomString1();

randomString2();

randomString3();

randomString4();

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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 Gajus on 10th January 2013
• Revision 2: published on 26th March 2013

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