Browser Diet - DOM Manipulation

JavaScript performance comparison

Revision 12 of this test case created by Mauricio Soares de Oliveira

Preparation code

<div id="myList"></div>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
DOM manipulation every iteration
var myList = document.getElementById("myList");

for (var i = 0; i < 100; i++) {
  myList.innerHTML += "<span>" + i + "</span>";
}
pending…
DOM manipulation after all iterations
var myList = "";

for (var i = 0; i < 100; i++) {
  myList += "<span>" + i + "</span>";
}

document.getElementById("myList").innerHTML = myList;
pending…
DOM manipulation after caching innerHTML
var myListHTML = document.getElementById("myList").innerHTML;

for (var i = 0; i < 100; i++) {
  myListHTML += "<span>" + i + "</span>";
}
pending…
DOM manipulation with Fragments
var myListHTML = document.getElementById("myList"), newHTML, fragments = document.createDocumentFragment();

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

  fragments.appendChild(newHTML);
}

myListHTML.appendChild(fragments);
pending…

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