Run results for: querySelector(), id vs class

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36 OPR/122.0.0.0

Browser: Opera 122

Operating system: Windows

Device Platform: Desktop

Date tested: 10 months ago

class

18.9M/s

8.2M/s

View exact numbers

Test name	Executions per second
✓ class	18,885,742 Ops/sec
id	8,217,888 Ops/sec

HTML Preparation code:

<section>
  <div>
    <p id="idName" class="className"></p>
  </div>
</section>

Tests: