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

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36
Chrome 80
Mac OS X 10.14.6
Desktop
5 years ago
Test name Executions per second
querySelector 3552479.5 Ops/sec
querySelectorAll 1464256.2 Ops/sec
getElementsByClassName 4461127.5 Ops/sec
querySelector (ID) 2415646.5 Ops/sec
getElementsByID 3476004.2 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")