HTTP/3 is the hot new networking protocol, available today! While you get most of its benefits out-of-the-box, there are also quite some things you can and should do to get maximise performance.
In this talk, we look at optimizing JS payloads for the first network round trips, how browsers prioritize JS against other resource types, SPA vs MPA nuances, and how to optimally use the 0-RTT and 103 Early Hints features. We also look at the protocol's integration with fetch() and talk about the upcoming WebTransport!