HTTP/3
termweb devnetworking
HTTP carried over QUIC on UDP, so loss on one stream no longer stalls the others.
Moving to UDP is what removes head-of-line blocking, and it brings consequences beyond speed. The transport is encrypted, so middleboxes see far less and traffic classification by inspection largely stops working. Connections survive a change of address, which is why a phone moving between networks keeps its session. And networks that block UDP force a fallback to the older version, which usually works and quietly costs the benefit.
Also known as: h3