innerHTML vs removeChild

JavaScript performance comparison

Revision 52 of this test case created by cromwellian

Info

what method for empty a element is faster ?

Preparation code

<div id='box1'></div>
<div id='box2'></div>
<script>
Benchmark.prototype.setup = function() {
    var testPattern = '<div>hello<div style="background-color: #000000;">ttt</div></div>';
    var i, testString;
    for(i = 0; i < 1000; i++) {
      testString += testPattern;
    }
   
    var box1 = document.getElementById('box1');
    var box2 = document.getElementById('box2');
   
    box1.innerHTML = testString;
    box2.innerHTML = testString;
};
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
removeChild
while (box1.firstChild) {
  box1.removeChild(box1.firstChild);
}
pending…
innerHTML
var parent = box2.parentNode;
parent.removeChild(box2);
box2.innerHTML = '';
parent.appendChild(box2);
 
pending…

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