Benchmark: Append children VS appendChild in loop VS replaceChildren moar

HTML Preparation code:

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

Script Preparation code:

const root = document.getElementById('root');
const numChildren = 100;
const children = [];

for (let i = 0; i < numChildren; i++) {
	children[i] = document.createElement('span');
}

Tests:

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
append
appendChild in loop
replaceChildren

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:141.0) Gecko/20100101 Firefox/141.0

Browser/OS: Firefox 141 on Windows

View result in a separate tab

Test name	Executions per second
append	373.8 Ops/sec
appendChild in loop	947.9 Ops/sec
replaceChildren	383.0 Ops/sec

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Test (while or forEach)

Append children VS appendChild in loop VS replaceChildren moar (version: 1)

Comparing performance of: append vs appendChild in loop vs replaceChildren

Created: 8 months ago by: Guest

Jump to the latest result

append

appendChild in loop

replaceChildren

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A