Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<div class="grid-container">
  <div class="grid">
  </div>
</div>
<script>
  Benchmark.prototype.setup = function() {
    var $gridTpl = $(".grid"),
        $gridContainer = $(".grid-container");
  };

  Benchmark.prototype.teardown = function() {
    $(".grid-container").remove();
  };
</script>

Preparation code output

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var i, len;
var $grid = $gridTpl.clone();

for(i = 0, len = 1000; i < len; i = i + 1) {
  $gridContainer.append($grid);
}

var i, len, grids = [];
var $grid = $gridTpl.clone();

for(i = 0, len = 1000; i < len; i = i + 1) {
  grids.push($grid.get(0));
}

$gridContainer.append( grids );

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