Run results for: DocumentFragment test

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Browser: Chrome 103

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
No frag	1.0 Ops/sec
With frag	17.8 Ops/sec

HTML Preparation code:

<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>
<div class="container"></div>

Tests:

No frag
var elements = []; for(var i=20; i--;) elements.push(document.createElement("div")); var e = document.getElementsByClassName("container"); for(var i=e.length; i--;) { for(var j=20; j--;) e[i].appendChild(elements[j].cloneNode(true)); }
With frag
var frag = document.createDocumentFragment(); for(var i=20; i--;) frag.appendChild(document.createElement("div")); var e = document.getElementsByClassName("container"); for(var i=e.length; i--;) e[i].appendChild(frag.cloneNode(true));

Run results for: DocumentFragment test

No frag

With frag