Run results for: Get elements by class: jQuery vs querySelectorAll vs getElementsByClassName (jQuery 1.x)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.4 Safari/605.1.15

Browser: Safari 15

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

getElementsByClassName

3.8M/s

querySelectorAll

1.4M/s

querySelectorAll: mixed selector

1.3M/s

jQuery 1.12.4

671K/s

jQuery 1.12.4: mixed selector

452K/s

View exact numbers

Test name	Executions per second
✓ getElementsByClassName	3,848,453 Ops/sec
querySelectorAll	1,373,356 Ops/sec
querySelectorAll: mixed selector	1,330,051 Ops/sec
jQuery 1.12.4	671,377 Ops/sec
jQuery 1.12.4: mixed selector	451,927 Ops/sec

HTML Preparation code:

<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>

<ul id="theList">
  <li class="odd">Item 1</li>    
  <li class="even">Item 2</li>    
  <li class="odd">Item 3</li>    
  <li class="even">Item 4</li>    
  <li class="odd">Item 5</li>    
  <li class="even">Item 6</li>    
  <li class="odd">Item 7</li>    
  <li class="even">Item 8</li>    
  <li class="odd">Item 9</li>    
  <li class="even">Item 10</li>    
  <li class="odd">Item 11</li>    
  <li class="even">Item 12</li>    
  <li class="odd">Item 13</li>    
  <li class="even">Item 14</li>    
  <li class="odd">Item 15</li>    
  <li class="even">Item 16</li>    
  <li class="odd">Item 17</li>    
  <li class="even">Item 18</li>    
  <li class="odd">Item 19</li>    
  <li class="even">Item 20</li>    
  <li class="odd">Item 21</li>    
  <li class="even">Item 22</li>    
  <li class="odd">Item 23</li>    
  <li class="even">Item 24</li>    
  <li class="odd">Item 25</li>    
  <li class="even">Item 26</li>    
  <li class="odd">Item 27</li>    
  <li class="even">Item 28</li>    
  <li class="odd">Item 29</li>    
  <li class="even">Item 30</li>    
</ul>

Tests: