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

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36
Chrome 96
Windows
Desktop
3 years ago
Test name Executions per second
getElementById 817493.0 Ops/sec
querySelector element ID 441832.7 Ops/sec
querySelector tag name 409139.1 Ops/sec
getElementsByTagName 295255.2 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;