Run results for: createElement vs cloneNode vs innerHTML

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; M2006C3MG) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.116 Mobile Safari/537.36 EdgA/46.04.2.5157

Browser: Chrome Mobile 77

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
createElement	0.5 Ops/sec
cloneNode (deep)	1.2 Ops/sec
innerHTML	0.2 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