Preparation code

<div id="#foo">Hello World</div>

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
 
<script>
  Benchmark.prototype.setup = function() {
    var x = 1
        $foo = $('#foo');
    
    var bindIt = function(){
      $foo.on('customEvent', function(){
         x++;
      });
    };
    
    bindIt();
    
    var $fooDetach = $foo.detach();
  };

  Benchmark.prototype.teardown = function() {
    $('#foo').off('customEvent');
    delete $foo;
    delete $fooDetach;
  };
</script>

Preparation code output

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var $new = $fooDetach.clone();
$('body').append($new);
bindIt();
$new.trigger('customEvent');

var $new = $fooDetach.clone(true);
$('body').append($new);
$new.trigger('customEvent');

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