Run results for: querySelector vs getElementsByClassName (get first element)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36 Edg/122.0.0.0

Browser: Chrome 122

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

querySelector

5.3M/s

getElementById

4.5M/s

getElementsByClassName (first element of)

3.5M/s

View exact numbers

Test name	Executions per second
✓ querySelector	5,316,136 Ops/sec
getElementById	4,539,970 Ops/sec
getElementsByClassName (first element of)	3,526,762 Ops/sec

HTML Preparation code:

<div id="test" class="test"></div>

Tests:

querySelector
document.querySelector(".test")
getElementsByClassName (first element of)
document.getElementsByClassName(".test")[0]
getElementById
document.getElementById("test")