Run results for: contains2 vs closest2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36 Edg/141.0.0.0

Browser: Chrome 141

Operating system: Windows

Device Platform: Desktop

Date tested: 6 months ago

Test name	Executions per second
contains	14430460.0 Ops/sec
closest	1815075.4 Ops/sec

HTML Preparation code:

<div id='div1'>
  <div id='div2'>
    <div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div>
    <div id='div3'>
    </div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
  </div>
</div>

Script Preparation code:

var box = document.getElementById('div1')
var clicked = document.getElementById('div3')

Tests:

contains
box.contains(clicked);
closest
const isClickInside = clicked.closest('#div1');