Run results for: querySelectorAll vs getElementsByTagName iteration

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; SM-T835) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.97 Safari/537.36 OPR/71.3.3718.67322

Browser: Opera 71

Operating system: Android

Device Platform: Tablet

Date tested: 2 years ago

Test name	Executions per second
querySelectorAll	96525.2 Ops/sec
getElementsByTagName	77523.2 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) {});