innerHTML vs removeChild vs jquery.empty

JavaScript performance comparison

Revision 117 of this test case created by Eamon Nerbonne

Preparation code

<div id="box" style="display:none;"></div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.3/jquery.min.js"></script>
<script>
function clearChildren(el) {
  var child;
  while(child=el.firstChild)
    el.removeChild(child);
}
</script>
      
<script>
Benchmark.prototype.setup = function() {
  var box = document.getElementById('box');
  for (var i=0;i<1000;i++){
      var c   = document.createElement('div');
      c.textContent = 'siodfj'+Date.now();
      box.appendChild(c);
  }

};

Benchmark.prototype.teardown = function() {
  if (box.childNodes.length > 0) alert('child nodes not cleared!')

};
</script>

Preparation code output

<div id="box" style="display:none;"></div>

Test runner

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Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
removeChild reversed
for (var i = box.childNodes.length - 1; i >= 0; i--) {
  box.removeChild(box.childNodes[i]);
}
pending…
innerHTML
box.innerHTML = '';
pending…
jQuery empty
$(box).empty()
pending…
remove firstChild
while (box.firstChild) {
	box.removeChild(box.firstChild);
}
pending…
remove lastChild
while (box.lastChild) {
	box.removeChild(box.lastChild);
}
pending…
remove firstChild function
clearChildren(box);
pending…
remove firstChild with var
while (i=box.firstChild) {
        box.removeChild(i);
}
pending…

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Revisions

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