Run results for: id vs testid

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36

Browser: Chrome 145

Operating system: Windows

Device Platform: Desktop

Date tested: 5 months ago

getElementById

12.6M/s

querySelector

6.7M/s

View exact numbers

Test name	Executions per second
✓ getElementById	12,639,725 Ops/sec
querySelector	6,714,240 Ops/sec

HTML Preparation code:

<div id="testdiv">
  <div id="unique" class="unique" name="unique" data-testid="unique">test</div>
</div>

Script Preparation code:

var i, imax;
var doc = document;

Tests:

querySelector
var test = doc.querySelector("div[data-testid='unique']").innerHTML;
getElementById
var test = doc.getElementById('unique').innerHTML;