Run results for: createElement vs insertAdjacentHTML but actually works

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; Trident/7.0; rv:11.0) like Gecko

Browser: IE 11

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
createElement	0.0 Ops/sec
insertAdjacentHTML	161.1 Ops/sec

HTML Preparation code:

<div id="test"></div>

Tests:

createElement
newElement = document.createElement("div"); newElement.id = "testing" for (i = 0; i < 1000; i++) { let newElementPart = document.createElement("div"); newElementPart.classList.add("testClass"); newElement.append(newElementPart); } document.getElementById("test").append(newElement);
insertAdjacentHTML
html = "<div id='testing'>" for (i = 0; i < 1000; i++) { html += "<div class='testClass'></div>"; } html += "</div>"; document.getElementById("test").insertAdjacentHTML("beforeend", html);