Run results for: innerHTML vs removeChild (checking and removing firstChild) vs removeChild (calling hasChildNodes and removing lastChild) vs removeChild (checking and removing lastChild)

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0

Browser: Firefox 78

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
innerHTML	2533363.8 Ops/sec
removeChild (checking and removing firstChild)	3314375.0 Ops/sec
removeChild (calling hasChildNodes and removing lastChild)	3289887.5 Ops/sec
removeChild (checking and removing lastChild)	3271906.0 Ops/sec

HTML Preparation code:

<div id="container"></div>

Script Preparation code:

var node = document.getElementById('container');

for(var i = 0; i < 1000; i++) node.appendChild(document.createElement('div'));

Tests:

innerHTML
var node = document.getElementById('container'); node.innerHTML = '';
removeChild (checking and removing firstChild)
var node = document.getElementById('container'); while(node.firstChild) node.removeChild(node.firstChild)
removeChild (calling hasChildNodes and removing lastChild)
var node = document.getElementById('container'); while(node.hasChildNodes()) node.removeChild(node.lastChild)
removeChild (checking and removing lastChild)
var node = document.getElementById('container'); while(node.lastChild) node.removeChild(node.lastChild)