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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Windows

Device Platform: Desktop

Date tested: 9 months ago

Test name	Executions per second
querySelector	3834753.5 Ops/sec
querySelectorAll	1805169.2 Ops/sec
getElementsByClassName	4817523.5 Ops/sec
querySelector (ID)	2266917.8 Ops/sec
getElementsByID	4280555.0 Ops/sec
getElementsByTagName	5069459.0 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")
getElementsByTagName
document.getElementsByTagName('div');

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