innerHTML vs createElement test

JavaScript performance comparison

Revision 13 of this test case created and last updated

Info

add Array.join()

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<div id="container">
</div>
<script>
Benchmark.prototype.setup = function() {
    document.getElementById('container').innerHTML = '';
};

Benchmark.prototype.teardown = function() {
    document.getElementById('container').innerHTML = '';
};
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
100 element innerHTML
var innerHTMLstr = '<div>';
for (var i = 0; i < 100; i++) {
  innerHTMLstr += '<div><span>' + i + '</span></div>';
}
innerHTMLstr+='</div>';

document.getElementById('container').innerHTML = innerHTMLstr;
pending…
100 element createElement added in sequence
var container = document.getElementById('container');
var outerdiv = document.createElement('div');
container.appendChild(outerdiv);

for (var i = 0; i < 100; i++) {
  var div = document.createElement('div');
  var span = document.createElement('span');

  span.innerHTML = i;
  div.appendChild(span);
  outerdiv.appendChild(div);

}
pending…
100 element createElement bulk add
var container = document.getElementById('container');
var outerdiv = document.createElement('div');

for (var i = 0; i < 100; i++) {
  var div = document.createElement('div');
  var span = document.createElement('span');

  span.innerHTML = i;
  div.appendChild(span);
  outerdiv.appendChild(div);

}

container.appendChild(outerdiv);
 
pending…
100 element innerHTML with Array.join()
var innerHTMLarray = [ '<div>' ];
for (var i = 0; i < 100; i++) {
  innerHTMLarray[innerHTMLarray.length] = '<div><span>';
  innerHTMLarray[innerHTMLarray.length] = i;
  innerHTMLarray[innerHTMLarray.length] = '</span></div>';
}
innerHTMLarray[innerHTMLarray.length] = '</div>';

document.getElementById('container').innerHTML = innerHTMLarray.join('');
pending…
100 element innerHTML with Array.join() and Array.push()
var innerHTMLarray = [ '<div>' ];
for (var i = 0; i < 100; i++) {
  innerHTMLarray.push('<div><span>', i, '</span></div>');
}
innerHTMLarray.push('</div>');

document.getElementById('container').innerHTML = innerHTMLarray.join('');
pending…

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