Benchmark: insertAdjacentHTML vs appendChild vs append vs insertAdjacentElement vs innerHTML repeat 1000

Script Preparation code:

// Change this number to see how well they scale
repeat = 1000;

Tests:

insertAdjacentHTML
const box = document.createElement('div'); let html = ''; for (let i = 0; i < repeat; i++) html += '<div class="a b"><div>Test</div></div>'; box.insertAdjacentHTML('beforeend', html);
appendChild
const box = document.createElement('div'); const els = []; for (let i = 0; i < repeat; i++) { const div2 = document.createElement('div'); div2.innerText = 'Test'; const div1 = document.createElement('div'); div1.className = 'a b'; div1.appendChild(div2); els.push(div1); } els.forEach(el => box.appendChild(el));
append
const box = document.createElement('div'); const els = []; for (let i = 0; i < repeat; i++) { const div2 = document.createElement('div'); div2.innerText = 'Test'; const div1 = document.createElement('div'); div1.className = 'a b'; div1.append(div2); els.push(div1); } box.append(...els);
insertAdjacentElement
const box = document.createElement('div'); const els = []; for (let i = 0; i < repeat; i++) { const div2 = document.createElement('div'); div2.innerText = 'Test'; const div1 = document.createElement('div'); div1.className = 'a b'; div1.insertAdjacentElement('beforeend', div2); els.push(div1); } els.forEach(el => box.insertAdjacentElement('beforeend', el));
innerHTML
const box = document.createElement('div'); let html = ''; for (let i = 0; i < repeat; i++) html += '<div class="a b"><div>Test</div></div>'; box.innerHTML += html;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
insertAdjacentHTML
appendChild
append
insertAdjacentElement
innerHTML

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:138.0) Gecko/20100101 Firefox/138.0

Browser/OS: Firefox 138 on Windows

View result in a separate tab

innerHTML

301/s

insertAdjacentHTML

239/s

appendChild

121/s

insertAdjacentElement

119/s

append

103/s

View exact numbers

Test name	Executions per second
✓ innerHTML	301 Ops/sec
insertAdjacentHTML	239 Ops/sec
appendChild	121 Ops/sec
insertAdjacentElement	119 Ops/sec
append	103 Ops/sec

insertAdjacentHTML vs appendChild vs append vs insertAdjacentElement vs innerHTML repeat 1000 (version: 1)

insertAdjacentHTML vs appendChild vs append vs insertAdjacentElement vs innerHTML

Comparing performance of: `insertAdjacentHTML vs appendChild vs append vs insertAdjacentElement vs innerHTML`

Created: one year ago by: Guest

Go to the latest result

insertAdjacentHTML

appendChild

append

insertAdjacentElement

innerHTML

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

insertAdjacentHTML vs appendChild vs append vs insertAdjacentElement vs innerHTML repeat 1000 (version: 1)

insertAdjacentHTML vs appendChild vs append vs insertAdjacentElement vs innerHTML

Comparing performance of: insertAdjacentHTML vs appendChild vs append vs insertAdjacentElement vs innerHTML

Created: one year ago by: Guest

Go to the latest result

insertAdjacentHTML

appendChild

append

insertAdjacentElement

innerHTML

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `insertAdjacentHTML vs appendChild vs append vs insertAdjacentElement vs innerHTML`