MeasureThat.net

Run results for: Testing getElementById vs getElementsByClassName vs querySelector vs querySelectorAll

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Safari/537.36 Edg/93.0.961.52
Chrome 93
Windows
Desktop
3 years ago
Test name Executions per second
getElementById 2494958.0 Ops/sec
getElementsByClassName 3103359.2 Ops/sec
querySelector 3399195.8 Ops/sec
querySelectorAll 1375131.5 Ops/sec
HTML Preparation code:
AخA
 
1
<div class="test" id="testing"></div>
Tests:

  • getElementById

     
    document.getElementById("testing")

  • getElementsByClassName

     
    document.getElementsByClassName("test")

  • querySelector

     
    document.querySelector(".test")

  • querySelectorAll

     
    document.querySelectorAll(".test")