Run results for: parentElement/nextElement vs querySelector

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:136.0) Gecko/20100101 Firefox/136.0

Browser: Firefox 136

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
querySelector	7525431.5 Ops/sec
parentElement/nextElement	2795226368.0 Ops/sec

HTML Preparation code:


<div id=''>
	<div id=''>
  		<div id='start'></div>
	</div>
</div>
<div id='end'></div>

Script Preparation code:

let start = document.querySelector('#start');

Tests: