JSFiddle - React, Tailwind, and code Playground

JavaScript

var numDivs = 10000,
    startTime = new Date();
var html = []
for(i = 0; i <= numDivs; i++) {
    html[i] = '<div>Actually, the DOM is fast.</div>';
}
$('body').html(html.join(''));

alert(new Date() - startTime);