Cloudflare introduced Argo in 2017 as an add-on premium service for Cloudflare users. Argo uses smart routing in real time to avoid network congestion. It dynamically finds the most optimal routes through the Cloudflare network and reduces the response times of your website.

Back Forward Cache is a technique browsers use to instantly load a Web Page when the Back or Forward buttons on the browsers are pressed.

Back/Forward Cache is currently supported by all major browsers including Google Chrome, Mozilla Firefox, and Safari. According to Google Chrome's data, about 10% of all navigations on Desktop are either Back or Forward. This number goes all the way to 20% in the case of Mobile browsing.

By ensuring that your website is eligible for Back/Forward Cache, you can make a dramatic difference to the Page Speed and User Experience of your website.

Google PageSpeed Insights is a great free tool for testing Web Performance and checking Core Web Vitals. However, it lacks many advanced features such as a Waterfall Chart and the ability to select the test location and device.

Round Trip Time (RTT) is a metric that measures the time taken by a network packet to travel from sender to receiver and then back from receiver to sender.

RTT = Latency (Client to Server) + Server Processing Time + Latency (Server to Client)

AVIF and WebP are two modern image formats that offer a great level of compression and features when compared to older formats such as JPEG and PNG.

As of August 2024, both formats are widely supported, but WebP has an edge as according to caniuse.com, it has 96.45% Browser support compared to 93.29% of AVIF.