Info

Compare performance of jQuery vs. native DOM APIs in moving the contents of one element under another.

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<script>
  Benchmark.prototype.setup = function() {
    $("body").append('<span id="test">Lorem ipsum <span id="selected-1">dolor sit</span><span id="selected-2" title="important info here"> amet, consectetur</span> adipiscing elit.</span>');
  };

  Benchmark.prototype.teardown = function() {
    $("#test").remove();
  };
</script>

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

var span1 = document.getElementById("selected-1"),
    span2 = document.getElementById("selected-2"),
    insert = span2.firstChild,
    elt;

while (elt = span1.lastChild) {
  insert = span2.insertBefore(elt, insert); // removes the node from span1
}

// This line causes jsperf to fail--why?
// span1.parentNode.removeChild(span1);

$('#selected-2').prepend($('#selected-1').html()).prev().remove();

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