Run results for: Append children VS appendChild in loop VS replaceChildren

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
append	66656.6 Ops/sec
appendChild in loop	38720.0 Ops/sec
replaceChildren	32320.5 Ops/sec

HTML Preparation code:

<div id="root"></div>

AخA
 
<div id="root"></div>

Script Preparation code:

var root = document.getElementById('root');
var children = [
    document.createElement('span'),
    document.createElement('span'),
    document.createElement('span'),
    document.createElement('span'),
    document.createElement('span'),
];

 
var root = document.getElementById('root');var children = [    document.createElement('span'),    document.createElement('span'),    document.createElement('span'),    document.createElement('span'),    document.createElement('span'),];

Tests:

append
root.append(...children);
root.append(...children);
appendChild in loop
for (let i = 0; i < 5; i++) { root.appendChild(children[i]); }
for (let i = 0; i < 5; i++) {
root.appendChild(children[i]);
}
replaceChildren
root.replaceChildren(...children)
root.replaceChildren(...children)