Run results for: get by id

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:48.0) Gecko/20100101 Firefox/48.0

Browser: Firefox 48

Operating system: Windows

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
vanilla	5935229.0 Ops/sec
jquery	1632895.0 Ops/sec
custom function	5915667.0 Ops/sec

HTML Preparation code:

<script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.1.0.min.js"></script>
<div id="testElement"></div>

Script Preparation code:

function getElement(a,b,c){var d;return void 0==b&&(d=document.getElementById(a)||document.querySelector(a)),null==d&&(0==b?(d=document.getElementsByClassName(a),0==d.length&&(d=document.getElementsByTagName(a)),0==d.length&&(d=document.querySelectorAll(a)),0==d.length&&(d=getElementsByClassName(a))):(c=null==c?0:c,d=document.getElementsByClassName(a)[c]||document.getElementsByTagName(a)[c]||document.querySelectorAll(a)[c]||getElementsByClassName(a)[c])),d}

Tests:

vanilla
var el = document.getElementById("testElement"); var className = el.className;
jquery
var el = $("#testElement")[0]; var className = el.className;
custom function
var el = getElement("testElement"); var className = el.className;

vanilla

jquery

custom function