Run results for: createElement vs cloneNode vs innerHTML

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_0_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.0.3

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
createElement	11.4 Ops/sec
cloneNode (deep)	41.6 Ops/sec
innerHTML	24.0 Ops/sec

Tests:

createElement
const list = []; let n = 0; while(true) { n++; const div = document.createElement('div'); const p = document.createElement('p'); p.classList.add('font-bold'); p.textContent = 'Hello!'; div.appendChild(p); list.push(div); if(n===100000) break; }
cloneNode (deep)
const list = []; let n = 0; const div = document.createElement('div'); const p = document.createElement('p'); p.classList.add('font-bold'); p.textContent = 'Hello!'; div.appendChild(p); while(true) { n++; list.push(div.cloneNode(true)); if(n===100000) break; }
innerHTML
const list = []; let n = 0; while(true) { n++; const div = document.createElement('div'); div.innerHTML = '<p class="font-bold">Hello!</p>'; list.push(div); if(n===100000) break; }

Run results for: createElement vs cloneNode vs innerHTML

Faster way to create new dom elements before insertion

createElement

cloneNode (deep)

innerHTML