Run results for: querySelectorAll().forEach vs arrayFrom(getElementsByClassName).forEach

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser: Chrome 122

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

querySelectorAll

56K/s

getElementsByClassName

28K/s

View exact numbers

Test name	Executions per second
✓ querySelectorAll	56,146 Ops/sec
getElementsByClassName	27,960 Ops/sec

HTML Preparation code:

<div class="name"></div>
<div class="name"></div>
<div class="name"></div>

Tests:

querySelectorAll
document.querySelectorAll(".name").forEach((e, i) => { console.log(e) })
getElementsByClassName
Array.from(document.getElementsByClassName("name")).forEach((e, i) => { console.log(e) })