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

Browser: Chrome 138

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

class

15.0M/s

6.6M/s

View exact numbers

Test name	Executions per second
✓ class	14,978,784 Ops/sec
id	6,576,988 Ops/sec

HTML Preparation code:

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

Tests: