Run results for: innerHTML vs append

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:78.0) Gecko/20100101 Firefox/78.0

Browser: Firefox 78

Operating system: Mac OS X 10.9

Device Platform: Desktop

Date tested: 4 days ago

Test name	Executions per second
append	112.3 Ops/sec
innerHTML	372.0 Ops/sec

HTML Preparation code:

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

Tests:

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