MeasureThat.net

Run results for: querySelectorAll vs getElementsByTagName iteration

Go to the benchmark
Run details:
Mozilla/5.0 (X11; Linux x86_64; rv:104.0) Gecko/20100101 Firefox/104.0
Firefox 104
Linux
Desktop
2 years ago
Test name Executions per second
querySelectorAll 494483.9 Ops/sec
getElementsByTagName 565219.1 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) {});