Run results for: querySelector(), document vs nested element

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36 OPR/121.0.0.0

Browser: Opera 121

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

nested element

31.4M/s

document

15.9M/s

View exact numbers

Test name	Executions per second
✓ nested element	31,387,578 Ops/sec
document	15,856,666 Ops/sec

HTML Preparation code:

<header>
  <p>header</p>
</header>
<section>
    <div>
        <p class="text">Text</p>
    </div>
</section>
<footer>
  <p>footer</p>
</footer>

Script Preparation code:

var section = document.querySelector('section');

Tests:

document
var text1 = document.querySelector('.text')
nested element
var text2 = section.querySelector('.text')