Run results for: Class vs Attribute selector modern

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:147.0) Gecko/20100101 Firefox/147.0

Browser: Firefox 147

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 7 months ago

Benchmark engine: Benchmark.js

Class selector

2.9M/s

Attribute selector

2.5M/s

View exact numbers

Test name	Executions per second
✓ Class selector	2,930,644 Ops/sec
Attribute selector	2,516,940 Ops/sec

HTML Preparation code:

<input type="text" class="search" data-search-input/>
<div class="results" data-results>
  <div class="element" data-result-element>Hello</div>
  <div class="element" data-result-element>World</div>
  <div class="element" data-result-element>Everyone</div>
</div>

Tests:

Class selector
let list = document.querySelector('.results'); let list_item = document.querySelector('.element'); let input = document.querySelector('.search');
Attribute selector
let list = document.querySelector('[class="results"]'); let list_item = document.querySelector('[class="element"]'); let input = document.querySelector('[class="search"]');