HTTP/2 is the latest version of the HTTP/1.1 protocol and was released in 2015. HTTP/2 is more efficient in how it processes and prioritizes content during the page load process. Like we mentioned in previous sections in this guide, prioritization can affect how resources are loaded, which has a cumulative effect on the overall page load time and user experience.
Use HTTP/2 for all Resources
What is HTTP/2?
How HTTP/2 Increases Website Performance
HTTP/3: Next in Line
As of July 2021, the HTTP/3 protocol was officially drafted. This protocol uses a new transport protocol, QUIC (Quick UDP (User Datagram Protocol) Internet Connections), which is supposed to eventually replace the TCP and TLS (Transport Layer Security) protocols. HTTP/3 offers benefits like faster data transfer rates, better reliability, and increased security/encryption features versus HTTP/2. However, at this time, QUIC has only seen limited adoption rates.
Lighthouse is an open-source tool that is used to run an audit against your web pages and provides scores and suggestions for improving page performance, accessibility, SEO, and more.
PageSpeed Insights is a tool created by Google that reports on the performance of a page on both mobile and desktop devices, and provides suggestions on how that page may be improved.