Run results for: clear html node children

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Browser: Chrome 69

Operating system: Linux

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
innerHTML	3630803.0 Ops/sec
removeChild firstChild	4906881.0 Ops/sec
removeChild lastChild	4522111.0 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