Run results for: clear html node children

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.183 Safari/537.36

Browser: Chrome 86

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
innerHTML	1494322.9 Ops/sec
removeChild firstChild	1878976.6 Ops/sec
removeChild lastChild	1854099.8 Ops/sec

HTML Preparation code:

<div id='x'></div>

Script Preparation code:

const root = document.getElementById('x');

for (let i = 0; i < 500; i++) {
	let notRoot = document.createElement('div')
    notRoot.innerHTML = `the rainbow eats sunlight under jupiter's moonlight ${Math.random()}`;
	root.appendChild(notRoot);
}

Tests:

innerHTML
const root = document.getElementById('x'); root.innerHTML = '';
removeChild firstChild
const root = document.getElementById('x'); while (root.firstChild) root.removeChild(root.firstChild);
removeChild lastChild
const root = document.getElementById('x'); while (root.lastChild) root.removeChild(root.lastChild);

Run results for: clear html node children

compare removing elements via innerHTML and removeChild

innerHTML

removeChild firstChild

removeChild lastChild