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 5.1; rv:52.0) Gecko/20100101 Firefox/52.0
Firefox 52
Windows XP
Desktop
one year ago
Test name Executions per second
querySelector 2087048.6 Ops/sec
querySelectorAll 547848.6 Ops/sec
getElementsByClassName 17944152.0 Ops/sec
querySelector (ID) 2135934.0 Ops/sec
getElementsByID 17867802.0 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")