Run results for: querySelectorAll vs getElementsByTagName iteration

Run details:

User agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:108.0) Gecko/20100101 Firefox/108.0

Browser: Firefox 108

Operating system: FreeBSD

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
querySelectorAll	365414.6 Ops/sec
getElementsByTagName	507722.7 Ops/sec

HTML Preparation code:

<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>

Tests:

querySelectorAll
const allDivs = document.querySelectorAll('div'); allDivs.forEach(function (div) {});
getElementsByTagName
const allDivs = document.getElementsByTagName('div'); const arrayAllDivs = Array.from(allDivs); arrayAllDivs.forEach(function (div) {});