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Run results for: getElementById vs querySelector vs getElementsByTagName pt. 2

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Run details:
Mozilla/5.0 (X11; Linux x86_64; rv:103.0) Gecko/20100101 Firefox/103.0
Firefox 103
Linux
Desktop
2 years ago
Test name Executions per second
getElementById 3839396.5 Ops/sec
querySelector element ID 2836472.2 Ops/sec
querySelector tag name 2934132.5 Ops/sec
getElementsByTagName 2102422.2 Ops/sec
HTML Preparation code:
AخA
 
1
<div id="testElement"></div>
Tests:

  • getElementById

     
    var el = document.getElementById('testElement');
    var className = el.className;

  • querySelector element ID

     
    var el = document.querySelector('#testElement');
    var className = el.className;

  • querySelector tag name

     
    var el = document.querySelector('div');
    var className = el.className;

  • getElementsByTagName

     
    var el = document.getElementsByTagName('div');
    var className = el.className;