Run results for: innerHTML vs insertAdjacentHTML vs appendChild vs insertAdjacentElement vs documentFragment

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.0

Device Platform: Mobile

Date tested: one year ago

5) documentFragment

35.5M/s

2) insertAdjacentHTML

13.7M/s

1) innerHTML +=

10.1M/s

3) appendChild

6.4M/s

4) insertAdjacentElement

5.7M/s

View exact numbers

Test name	Executions per second
✓ 5) documentFragment	35,457,756 Ops/sec
2) insertAdjacentHTML	13,665,452 Ops/sec
1) innerHTML +=	10,133,770 Ops/sec
3) appendChild	6,400,866 Ops/sec
4) insertAdjacentElement	5,693,564 Ops/sec

Script Preparation code:

 box1 = document.createElement("div");

 box2 = document.createElement("div");
 fragment = document.createDocumentFragment();
 box2HTML = box2.innerHTML;

Tests:

1) innerHTML +=
box1.innerHTML += box2HTML;
2) insertAdjacentHTML
box1.insertAdjacentHTML('beforeend', box2HTML);
3) appendChild
box1.appendChild(box2);
4) insertAdjacentElement
box1.insertAdjacentElement('beforeend', box2);
5) documentFragment
box1.appendChild(fragment);