Yes, I was explicitly referring to HTTP1/1. With HTTP2, connection multiplexing is baked into the HTTP/2 protocol. But again, whether or not this speeds things

Yes, I was explicitly referring to HTTP1/1. With HTTP2, connection multiplexing is baked into the HTTP/2 protocol. But again, whether or not this speeds things is hard to tell without knowing all relevant parameters. There is a reason HTTP/3 uses QUIC over UDP, the main motivation was to put the userspace (i.e. browser) more in control over congestion control and such things (while TCP is always kernel-implementation dependent). And I think we will see lot of different implementations and innovations in this field (just as there is a ton of different TCP congestion window scaling algorithms).