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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; rv:95.0) Gecko/20100101 Firefox/95.0
Firefox 95
Windows
Desktop
3 years ago
Test name Executions per second
getElementById 1326466.2 Ops/sec
querySelector element ID 757585.4 Ops/sec
querySelector tag name 786783.4 Ops/sec
getElementsByTagName 623012.2 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;