Run results for: clear html element children

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0 Waterfox/56.3

Browser: Firefox 56

Operating system: Windows 7

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
innerHTML	2128427.8 Ops/sec
removeChild firstChild	3852448.0 Ops/sec
removeChild lastChild	3890127.0 Ops/sec
textContent	2113487.5 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