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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser: Chrome 109

Operating system: Windows

Device Platform: Desktop

Date tested: 2 months ago

Test name	Executions per second
querySelector	8650168.0 Ops/sec
querySelectorAll	2315579.2 Ops/sec
getElementsByClassName	14549909.0 Ops/sec
querySelector (ID)	4767273.0 Ops/sec
getElementsByID	22500926.0 Ops/sec
querySelectorAll+	1430627.8 Ops/sec

HTML Preparation code:

<div class="test" id="test" data-x></div>

Tests:

querySelector
document.querySelector(".test")
querySelectorAll
document.querySelectorAll(".test")
getElementsByClassName
document.getElementsByClassName("test")
querySelector (ID)
document.querySelector("#test")
getElementsByID
document.getElementById("test")
querySelectorAll+
document.querySelectorAll("[data-x]")