Run results for: Class vs Attribute selector modern

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36

Browser: Chrome 144

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 7 months ago

Benchmark engine: Benchmark.js

Class selector

12.8M/s

Attribute selector

5.2M/s

View exact numbers

Test name	Executions per second
✓ Class selector	12,795,568 Ops/sec
Attribute selector	5,210,343 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"]');