Run results for: querySelector vs getElementsByName vs getElementById vs getElementsByClassName - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:86.0) Gecko/20100101 Firefox/86.0

Browser: Firefox 86

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
querySelector	3144849.0 Ops/sec
getElementsByName	5998045.5 Ops/sec
getElementById	5985357.5 Ops/sec
getElementsByClassName	5914332.5 Ops/sec

HTML Preparation code:

<div name='test' id='test' class='test'></div>

Tests:

querySelector
document.querySelector('#test')
getElementsByName
document.getElementsByName('div[name="#test"]')
getElementById
document.getElementById('test')
getElementsByClassName
document.getElementsByClassName(".test")