innerHTML vs removeChild

JavaScript performance comparison

Revision 417 of this test case created by Isaac Jurado

Preparation code

<div id='box1'></div>
<div id='box2'></div>
<div id='box3'></div>
<div><div id='box4'></div></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');
  var box3 = document.getElementById('box3');
  var box4 = document.getElementById('box4');
  
  box1.innerHTML = testString;
  box2.innerHTML = testString;
  box3.innerHTML = testString;
  box4.innerHTML = testString;

};
</script>

Preparation code output

<div id='box1'></div> <div id='box2'></div> <div id='box3'></div> <div><div id='box4'></div></div>

Test runner

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Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
replaceChild in the parent (for reference)
var parent = box4.parentNode;
var replacement = box4.cloneNode(false);  // shallow
parent.replaceChild(replacement, box4);
pending…
removeChild using for loop
for (let childId = 0; i < box3.childElementCount; i++) {
  box3.removeChild(box3.children[childId]);
}
pending…
removeChild using firstChild
while (box1.firstChild) {
  box1.removeChild(box1.firstChild);
}
pending…
innerHTML
box2.innerHTML = '';
pending…

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Revisions

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