Run results for: Compare speed

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36

Browser: Chrome 99

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
contains() method	2272874.0 Ops/sec
parrentElement	3241636.0 Ops/sec

HTML Preparation code:

<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");

Tests:

contains() method
outer.contains(inner) === true
parrentElement
inner.parentElement === outer

Run results for: Compare speed

contains() method

parrentElement