Run results for: querySelector from document or from element

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:92.0) Gecko/20100101 Firefox/92.0

Browser: Firefox 92

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
querySelector from document	4261732.0 Ops/sec
querySelector from element	15865390.0 Ops/sec

HTML Preparation code:

<html>

<body>
    <div>
        <div>
            <div>
                <div class="element">
                    <div class="test"></div>
                </div>
            </div>
        </div>
    </div>
</body>

</html>

Script Preparation code:

window.element = document.querySelector('.element');

Tests:

querySelector from document
const theHtml = document.querySelector('.test');
querySelector from element
const theHtml = element.querySelector('.test');

Run results for: querySelector from document or from element

Figuring out what's faster, using querySelector from document or from an element closer to the wanted element

querySelector from document

querySelector from element