Run results for: Remove all children from DOM element-1a

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0

Browser: Firefox 128

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Remove lastChild

4.0M/s

Remove firstChild

4.0M/s

lastChild.remove

3.9M/s

firstChild.remove

3.9M/s

replaceChildren

1.6M/s

View exact numbers

Test name	Executions per second
✓ Remove lastChild	3,984,232 Ops/sec
Remove firstChild	3,969,051 Ops/sec
lastChild.remove	3,946,298 Ops/sec
firstChild.remove	3,939,422 Ops/sec
replaceChildren	1,564,485 Ops/sec

HTML Preparation code:

<div id='messages'></div>

Script Preparation code:

const html = [];
for(i=0; i<1000; i++) {
	html.push("<span>Text</span>");
}
document.getElementById("messages").insertAdjacentHTML('beforeend', html)

Tests:

Remove firstChild
let list = document.getElementById("messages"); while (list.firstChild) { list.removeChild(list.firstChild); }
Remove lastChild
let list = document.getElementById("messages"); while (list.lastChild) { list.removeChild(list.lastChild); }
firstChild.remove
let list = document.getElementById("messages"); while (list.firstChild) { list.firstChild.remove(); }
lastChild.remove
let list = document.getElementById("messages"); while (list.lastChild) { list.lastChild.remove(); }
replaceChildren
let list = document.getElementById("messages"); list.replaceChildren();