Run results for: querySelectorAll vs getElementsByTagName vs getElementsByClassName with 968 nodes

Run details:
User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36
Browser: Chrome 81
Operating system: Windows
Device Platform: Desktop
Date tested: 4 years ago
Test name	Executions per second
Get td elements by data attribute	29839.8 Ops/sec
Get inner paragraph elements by tag name	1923168.4 Ops/sec
Get inner paragraph elements by tag name with querySelectorAll	71672.5 Ops/sec
Get td elements by class attribute	1911969.8 Ops/sec
Get td elements by class with querySelectorAll	71104.3 Ops/sec
HTML Preparation code:
<table>
<thead>
  <tr>
    <th>Stuff</th>
    <th>Thing</th>
    <th>Ok</th>
    <th>Stuff</th>
    <th>Thing</th>
    <th>Ok</th>
    <th>Stuff</th>
    <th>Thing</th>
    <th>Ok</th>
    <th>Stuff</th>
    <th>Thing</th>
    <th>Ok</th>
    <th>Stuff</th>
    <th>Thing</th>
    <th>Ok</th>
  </tr>
</thead>
<tbody>
  <tr>
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    <td data-stuff="blah" class="blah"><p>Hi!</p></td>
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    <td data-stuff="blah" class="blah"><p>Hi!</p></td>
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</tbody>
</table>
<table>
<thead>
  <tr>
    <th>Stuff</th>
    <th>Thing</th>
    <th>Ok</th>
    <th>Stuff</th>
    <th>Thing</th>
    <th>Ok</th>
    <th>Stuff</th>
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    <th>Thing</th>
    <th>Ok</th>
  </tr>
</thead>
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    <td data-stuff="blah" class="blah"><p>Hi!</p></td>
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    <td data-stuff="blah" class="blah"><p>Hi!</p></td>
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</tbody>
</table>
<table>
<thead>
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    <th>Stuff</th>
    <th>Thing</th>
    <th>Ok</th>
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  </tr>
</thead>
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    <td data-stuff="blah" class="blah"><p>Hi!</p></td>
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    <td data-stuff="blah" class="blah"><p>Hi!</p></td>
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</table>
<table>
<thead>
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  </tr>
</tbody>
</table>
<table>
<thead>
  <tr>
    <th>Stuff</th>
    <th>Thing</th>
    <th>Ok</th>
    <th>Stuff</th>
    <th>Thing</th>
    <th>Ok</th>
    <th>Stuff</th>
    <th>Thing</th>
    <th>Ok</th>
    <th>Stuff</th>
    <th>Thing</th>
    <th>Ok</th>
    <th>Stuff</th>
    <th>Thing</th>
    <th>Ok</th>
  </tr>
</thead>
<tbody>
  <tr>
    <td></td>
    <td></td>
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  </tr>
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  </tr>
  <tr>
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    <td></td>
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    <td></td>
    <td data-stuff="blah" class="blah"><p>Hi!</p></td>
    <td></td>
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  </tr>
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  </tr>
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  </tr>
  <tr>
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  </tr>
  <tr>
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    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td data-stuff="blah" class="blah"><p>Hi!</p></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
  </tr>
  <tr>
    <td></td>
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  </tr>
  <tr>
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    <td></td>
  </tr>
  <tr>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
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  </tr>
  <tr>
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  </tr>
  <tr>
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  </tr>
  <tr>
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  </tr>
  <tr>
    <td></td>
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    <td></td>
  </tr>
</tbody>
</table>
Tests:
Get td elements by data attribute
const byDataAttribute = document.querySelectorAll('[data-stuff="blah"]')
Get inner paragraph elements by tag name
const byTagName = document.getElementsByTagName('p')
Get inner paragraph elements by tag name with querySelectorAll
const byTagNameWithQSAll = document.querySelectorAll('p')
Get td elements by class attribute
const byClassName = document.getElementsByClassName('blah')
Get td elements by class with querySelectorAll
const byClassWithQSAll = document.querySelectorAll('.blah')
Run results for: querySelectorAll vs getElementsByTagName vs getElementsByClassName with 968 nodes

Get td elements by data attribute

Get inner paragraph elements by tag name

Get inner paragraph elements by tag name with querySelectorAll

Get td elements by class attribute

Get td elements by class with querySelectorAll
