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

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Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_0_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0.1 Mobile/15E148 Safari/604.1
Mobile Safari 18
iOS 18.0.1
Mobile
6 months ago
Test name Executions per second
getElementById 8926841.0 Ops/sec
querySelector element ID 3694735.8 Ops/sec
querySelector tag name 4168903.2 Ops/sec
getElementsByTagName 7583361.5 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;