Run results for: replaceChildren vs while w/ appendChild

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser: Chrome 125

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

replaceChildren

139/s

while w/ appendChild

118/s

View exact numbers

Test name	Executions per second
✓ replaceChildren	139 Ops/sec
while w/ appendChild	118 Ops/sec

HTML Preparation code:

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

Script Preparation code:

const node = document.getElementById('container');
const fragment = document.createDocumentFragment();

for(let i = 0; i < 10000; i++) {
	node.appendChild(document.createElement('div'));
	fragment.appendChild(document.createElement('div'));
}

Tests:

while w/ appendChild
const node = document.getElementById('container'); const fragment = document.createDocumentFragment(); for(let i = 0; i < 10000; i++) { fragment.appendChild(document.createElement('div')); } while (node.firstChild) { node.removeChild(node.lastChild); } node.appendChild(fragment);
replaceChildren
const node = document.getElementById('container'); const fragment = document.createDocumentFragment(); for(let i = 0; i < 10000; i++) { fragment.appendChild(document.createElement('div')); } node.replaceChildren(fragment);