appendChild vs. DocumentFragment vs. innerHTML

JavaScript performance comparison

Revision 55 of this test case created

Info

Comparing 3 different ways to dynamically insert new elements into the DOM tree.

Preparation code

<div id="test1">
</div>
<script>
function text(node, txt) {
    for(var i =0; i <20;i++)
   {
       node.appendChild(document.createTextNode(txt + i));
   }
    return node;
  }
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
appendChild
var div1 = document.getElementById("test1"),
  row, cell;

for (var i = 0; i < 200; i++) {
  row = document.createElement('div');
  for (var j = 0; j < 20; j++) {
    cell = document.createElement('span');
    text(cell, Math.random());
    row.appendChild(cell);
  }
  div1.appendChild(row);
}


div1.innerHTML = '';
pending…
DocumentFragment
var div1 = document.getElementById("test1"),
  row, cell, docFrag;
docFrag = document.createDocumentFragment();
for (var i = 0; i < 200; i++) {
  row = document.createElement('div');
  for (var j = 0; j < 20; j++) {
    cell = document.createElement('span');
    text(cell, Math.random());
    row.appendChild(cell);
  }
  docFrag.appendChild(row);
}
div1.appendChild(docFrag);

div1.innerHTML = '';
pending…
innerHTML
var div1 = document.getElementById("test1"),
  row, cell, html = '';

for (var i = 0; i < 200; i++) {
  row = '<div>';
  for (var j = 0; j < 20; j++) {
    row += '<span>' + Math.random() + '</span>';
  }
  html += row + '</div>';
}
div1.innerHTML = html;
div1.innerHTML = '';
pending…

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