Run results for: getElementsByClassName last element vs getElementById as last element

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
getElementsByClassName last element	5771877.5 Ops/sec
getElementById as last element	9938966.0 Ops/sec

HTML Preparation code:

<div class='test'>
  <div class='other'>
    <div class='other'>
      <a href='#'>
        Dummy
      </a>
    </div>
  </div>
</div>
<div class='test'>
  <div class='other'>
    <div class='other'>
      <a href='#'>
        Dummy
      </a>
    </div>
  </div>
</div>
<div class='test'>
  <div class='other'>
    <div class='other'>
      <a href='#'>
        Dummy
      </a>
    </div>
  </div>
</div>
<div class='test'>
  <div class='other'>
    <div class='other'>
      <a href='#'>
        Dummy
      </a>
    </div>
  </div>
</div>
<div class='test'>
  <div class='other'>
    <div class='other'>
      <a href='#'>
        Dummy
      </a>
    </div>
  </div>
</div>
<div class='test'>
  <div class='other'>
    <div class='other'>
      <a href='#'>
        Dummy
      </a>
    </div>
  </div>
</div>
<div class='test'>
  <div class='other'>
    <div class='other'>
      <a href='#'>
        Dummy
      </a>
    </div>
  </div>
</div>
<div class='test'>
  <div class='other'>
    <div class='other'>
      <a href='#'>
        Dummy
      </a>
    </div>
  </div>
</div>
<div class='test'>
  <div class='other'>
    <div class='other'>
      <a href='#'>
        Dummy
      </a>
    </div>
  </div>
</div>
<div class='test' id='final'>
  <div class='other'>
    <div class='other'>
      <a href='#'>
        Dummy
      </a>
    </div>
  </div>
</div>

Tests:

getElementsByClassName last element
var final = document.getElementsByClassName('test'); final[final.length - 1];
getElementById as last element
var final = document.getElementById('final'); final;