MeasureThat.net

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

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Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 14_8 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.2 Mobile/15E148 Safari/604.1
Mobile Safari 14
iOS 14.8
Mobile
3 years ago
Test name Executions per second
getElementById 5355595.0 Ops/sec
getElementsByClassName 4270408.0 Ops/sec
querySelector 4230724.0 Ops/sec
querySelectorAll 2711448.5 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")