According to Kissmetrics, “47 percent of visitors expect a website to load in less than 2 seconds, and 40 percent of visitors will leave the website if the loading process takes more than 3 seconds.” [Source] Wow, only 2-3 seconds! We have to deliver our content really quickly. While our back-end team is working every day on a back-end optimization, what can we do on a front-end?