Run results for: Single append vs multiple appendChild for large number of nodes

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.3 Safari/605.1.15

Browser: Safari 16

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
append	2794.5 Ops/sec
appendChild	2590.5 Ops/sec

HTML Preparation code:

<div id="wrapper"></div>

AخA
 
<div id="wrapper"></div>

Script Preparation code:

window.items = Array.from({ length: 1024 }, () => document.createElement('div'));
window.wrapper = document.getElementById('wrapper');

 
window.items = Array.from({ length: 1024 }, () => document.createElement('div'));window.wrapper = document.getElementById('wrapper');

Tests:

append
Element.prototype.append.apply(wrapper, items);
Element.prototype.append.apply(wrapper, items);
appendChild
for (let element of items) wrapper.appendChild(element);
for (let element of items) wrapper.appendChild(element);