Preparation code

<div id="test"><div>old content</div>
</div>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<script>
  Benchmark.prototype.setup = function() {
    var existing = $('#test').children()[0];
    var parent = $('#test')[0];
    
    var renderNewElement = function() {
        var e = document.createElement('div');
        e.innerHTML = "<div>some content</div>";
        parent.replaceChild(e, existing);
        existing = e;
    };
    
    var renderInnerHTML = function() {
        parent.innerHTML = "<div>some content</div>";
        }
  };
</script>

Preparation code output

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renderNewElement();

renderInnerHTML();

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