After almost five years in development, the new HTTP/3 protocol is nearing its final form. Let’s take a close look at the performance improvements of HTTP/3, congestion control, head-of-line-blocking, and 0-RTT connection set-up. Welcome back to this series about the new HTTP/3 protocol. In part 1, we looked at why exactly we need HTTP/3 and the underlying QUIC protocol, and what their main new fe