Run results for: getElementById vs querySelector２

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:122.0) Gecko/20100101 Firefox/122.0

Browser: Firefox 122

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

getElementById

9.2M/s

querySelector

4.3M/s

View exact numbers

Test name	Executions per second
✓ getElementById	9,237,728 Ops/sec
querySelector	4,322,403 Ops/sec

HTML Preparation code:

<div id="testElement2">You can't do it with the strike tag OR the text-decoration:line-through style. The line position is built-in. You could roll your own style for that, but it would be a huge PITA.</div>
<div id="testElement12"></div>
<div id="testElement"></div>
<div>
  <div id="testElement4"><button></button></div>
<div id="testElement5"></div>
</div>
<div id="testElement6"></div>
<div id="testElement7">You can't do it with the strike tag OR the text-decoration:line-through style. The line position is built-in. You could roll your own style for that, but it would be a huge PITA.</div>
<div id="testElement8"></div>
<div id="testElement9"></div>

Tests:

getElementById
var el = document.getElementById('testElement'); var className = el.className;
querySelector
var el = document.querySelector('#testElement'); var className = el.className;