Run results for: querySelector vs querySelectorAll vs getElementsByClassName vs querySelector (ID) vs getElementsByID - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:133.0) Gecko/20100101 Firefox/133.0

Browser: Firefox 133

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 4 months ago

Test name	Executions per second
querySelector	1283194.8 Ops/sec
querySelectorAll	662033.4 Ops/sec
getElementsByClassName	2110636.0 Ops/sec
querySelector (ID)	1328190.6 Ops/sec
getElementsByID	2280730.2 Ops/sec

HTML Preparation code:

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

Tests:

querySelector
document.querySelector(".test")
querySelectorAll
document.querySelectorAll(".test")
getElementsByClassName
document.getElementsByClassName(".test")
querySelector (ID)
document.querySelector("#test")
getElementsByID
document.getElementById("test")