MeasureThat.net

Run results for: querySelectorAll vs getElementsByTagName iteration

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36
Chrome 89
Windows
Desktop
3 years ago
Test name Executions per second
querySelectorAll 311555.3 Ops/sec
getElementsByTagName 231111.2 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) {});