Run results for: jQuery.contains() vs. Node.contains()

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:75.0) Gecko/20100101 Firefox/75.0

Browser: Firefox 75

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
jQuery.contains()	1171658.6 Ops/sec
Node.contains()	4188889.5 Ops/sec

HTML Preparation code:

<script
  src="https://code.jquery.com/jquery-3.4.1.min.js"
  integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo="
  crossorigin="anonymous"></script>

<div id="outer">
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div id="inner">

</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>


<div id="outer2">
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div id="inner2">

</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>

Script Preparation code:

var inner = document.getElementById("inner");
var outer = document.getElementById("outer");
var inner2 = document.getElementById("inner2");
var outer2 = document.getElementById("outer2");

Tests:

jQuery.contains()
var x = jQuery.contains(outer, inner) var y = jQuery.contains(outer, inner2) var z = jQuery.contains(outer2, inner) var a = jQuery.contains(outer2, inner2)
Node.contains()
var x = outer.contains(inner) var y = outer.contains(inner2) var z = outer2.contains(inner) var a = outer2.contains(inner2)