Run results for: getElementById vs getElementsByClassName V2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36 Edg/92.0.902.62

Browser: Chrome 92

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
getElementById	7349160.5 Ops/sec
getElementsByClassName	4348753.5 Ops/sec

HTML Preparation code:

<div id="testdiv">
  <div id="unique" class="unique" name="unique" data-unique="1">test</div>
</div>

AخA
 
<div id="testdiv">
  <div id="unique" class="unique" name="unique" data-unique="1">test</div>
</div>

Script Preparation code:

var i, imax;
var doc = document;

 
var i, imax;var doc = document;

Tests:

getElementById
var test = doc.getElementById('unique');
var test = doc.getElementById('unique');
getElementsByClassName
var test = doc.getElementsByClassName('unique')[0]
var test = doc.getElementsByClassName('unique')[0]