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Run results for:
querySelectorAll vs getElementsByClassName performance test for demo
Compare javascript selector performance
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=613580" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Android 16; Mobile; rv:140.0) Gecko/140.0 Firefox/140.0
Browser:
Firefox Mobile 140
Operating system:
Android
Device Platform:
Mobile
Date tested:
11 months ago
Test name
Executions per second
querySelectorAll
1239465.2 Ops/sec
getElementsByClassName
6052661.0 Ops/sec
HTML Preparation code:
<ul> <li class="list">Text Element 1</li> <li class="list">Text Element 2</li> <li class="list">Text Element 3</li> <li class="list">Text Element 4</li> <li class="list">Text Element 5</li> <li class="list">Text Element 6</li> <li class="list">Text Element 7</li> <li class="list">Text Element 8</li> <li class="list">Text Element 9</li> <li class="list">Text Element 10</li> <li class="list">Text Element 11</li> <li class="list">Text Element 12</li> <li class="list">Text Element 13</li> <li class="list">Text Element 14</li> <li class="list">Text Element 15</li> <li class="list">Text Element 16</li> <li class="list">Text Element 17</li> <li class="list">Text Element 18</li> <li class="list">Text Element 19</li> <li class="list">Text Element 20</li> </ul>
Tests:
querySelectorAll
document.querySelectorAll('li');
getElementsByClassName
document.getElementsByClassName('list');