Run results for: createElement vs cloneNode vs innerHTML

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36 OPR/93.0.0.0 (Edition GX-CN)

Browser: Opera 93

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
createElement	2.4 Ops/sec
cloneNode (deep)	6.8 Ops/sec
innerHTML	1.5 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