Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var uuid1 = function() {
        return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
          var r = Math.random() * 16 | 0,
              v = c == 'x' ? r : (r & 0x3 | 0x8);
          return v.toString(16);
        });
        };
    
    var CHARS = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
    
    var uuid2 = function() {
        var uuid = new Array(36),
            rnd = 0,
            r;
        for (var i = 0; i < 36; i++) {
          if (i == 8 || i == 13 || i == 18 || i == 23) {
            uuid[i] = '-';
          } else if (i == 14) {
            uuid[i] = '4';
          } else {
            if (rnd <= 0x02) rnd = 0x2000000 + (Math.random() * 0x1000000) | 0;
            r = rnd & 0xf;
            rnd = rnd >> 4;
            uuid[i] = CHARS[(i == 19) ? (r & 0x3) | 0x8 : r];
          }
        }
        return uuid.join('');
        }
    
        var replaceFunc = function(c) {
              var r = Math.random() * 16 | 0,
                  v = c == 'x' ? r : (r & 0x3 | 0x8);
              return v.toString(16);
            };
        var uuid3 = function() {
            return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, replaceFunc);
            };
  };
</script>

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uuid1();

uuid2();

uuid3();

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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 on 3rd February 2012
• Revision 2: published on 4th February 2012

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