MeasureThat.net

Run results for: querySelector vs querySelectorAll vs getElementsByClassName vs querySelector (ID) vs getElementsByID

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Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36
Chrome 87
Windows 7
Desktop
4 years ago
Test name Executions per second
querySelector 1545928.1 Ops/sec
querySelectorAll 631981.7 Ops/sec
getElementsByClassName 1813760.0 Ops/sec
querySelector (ID) 1025135.3 Ops/sec
getElementsByID 1425054.9 Ops/sec
HTML Preparation code:
AخA
 
1
<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")