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: 2 years ago

Benchmark engine: Benchmark.js

previousSibling

1.8M/s

nextSibling

1.8M/s

firstChild

1.8M/s

parentNode

1.6M/s

firstChild.nextSibling

1.4M/s

querySelectorAll class

427K/s

querySelectorAll data attributed

354K/s

View exact numbers

Test name	Executions per second
✓ previousSibling	1,827,632 Ops/sec
nextSibling	1,813,090 Ops/sec
firstChild	1,751,765 Ops/sec
parentNode	1,608,061 Ops/sec
firstChild.nextSibling	1,439,607 Ops/sec
querySelectorAll class	427,310 Ops/sec
querySelectorAll data attributed	354,409 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: