JSFiddle - React, Tailwind, and code Playground

JavaScript

var numDivs = 10000,
    startTime = new Date();
var container = $('<div>');
while(numDivs--){
    $('<div>Actually, the DOM is fast.</div>').appendTo(container)
}
$('body').html( container.html() );

alert(new Date() - startTime);