Run results for: clear html element children

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.36

Browser: Chrome 87

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
innerHTML	10220.9 Ops/sec
removeChild firstChild	7108.5 Ops/sec
removeChild lastChild	6696.1 Ops/sec
textContent	12156.7 Ops/sec

HTML Preparation code:

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

Script Preparation code:

const root = document.getElementById('x');

for (let i = 0; i < 100; 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').cloneNode(true); root.innerHTML = '';
removeChild firstChild
const root = document.getElementById('x').cloneNode(true); while (root.firstChild) root.removeChild(root.firstChild);
removeChild lastChild
const root = document.getElementById('x').cloneNode(true); while (root.lastChild) root.removeChild(root.lastChild);
textContent
const root = document.getElementById('x').cloneNode(true); root.textContent = '';

Run results for: clear html element children

innerHTML

removeChild firstChild

removeChild lastChild

textContent