MeasureThat.net

Run results for: querySelectorAll vs getElementsByTagName iteration

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Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 15_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.3 Mobile/15E148 Safari/604.1
Mobile Safari 15
iOS 15.3.1
Mobile
3 years ago
Test name Executions per second
querySelectorAll 995163.4 Ops/sec
getElementsByTagName 847529.4 Ops/sec
HTML Preparation code:
AخA
 
1
<div></div>
2
<div></div>
3
<div></div>
4
<div></div>
5
<div></div>
6
<div></div>
7
<div></div>
8
<div></div>
9
<div></div>
10
<div></div>
Tests:

  • querySelectorAll

     
    const allDivs = document.querySelectorAll('div');
    allDivs.forEach(function (div) {});

  • getElementsByTagName

     
    const allDivs = document.getElementsByTagName('div');
    const arrayAllDivs = Array.from(allDivs);
    arrayAllDivs.forEach(function (div) {});