Run results for: parentNode vs firstChild vs nextSibling vs previousSibling (plus bonus: firstChild.nextSibling, querySelectorAlls)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Windows

Device Platform: Desktop

Date tested: 3 months ago

Test name	Executions per second
parentNode	1608060.8 Ops/sec
firstChild	1751765.1 Ops/sec
nextSibling	1813089.8 Ops/sec
previousSibling	1827631.5 Ops/sec
firstChild.nextSibling	1439607.4 Ops/sec
querySelectorAll class	427310.4 Ops/sec
querySelectorAll data attributed	354409.2 Ops/sec

HTML Preparation code:

<html>

<body>
    <div id='test'><div class='child' data-t></div><div></div><div></div></div>
</body>

</html>

Script Preparation code:

var parent = document.getElementById('test');
var child1 = parent.children[0]
var child2 = parent.children[1]

Tests: