Run results for: children vs queryselector

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36 Edg/134.0.0.0

Browser: Chrome 134

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

queryselector

628K/s

children

555K/s

View exact numbers

Test name	Executions per second
✓ queryselector	627,600 Ops/sec
children	555,246 Ops/sec

HTML Preparation code:

<div><custom-element></custom-element></div>

Tests:

children
const divs = document.querySelectorAll("div") Array.from(divs).map(div => { div.children[0] })
queryselector
const divs = document.querySelectorAll("div") Array.from(divs).map(div => { div.querySelector('custom-element') })