Run results for: parentElement/nextElement vs querySelector

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

querySelector

1.8M/s

parentElement/nextElement

1.1M/s

View exact numbers

Test name	Executions per second
✓ querySelector	1,844,773 Ops/sec
parentElement/nextElement	1,138,543 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: