Run results for: getElementById vs ParentElement.children

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0

Browser: Firefox 115

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
getElementById	5719495.5 Ops/sec
children	7585461.5 Ops/sec

HTML Preparation code:

<div id="test_element_id" class="test_element_class"></div>

Script Preparation code:

var p = document.getElementById('test_element_id').parentElement;

Tests:

getElementById
var el = document.getElementById('test_element_id'); var className = el.className;
children
var el = p.children['test_element_id']; var className = el.className;