Comment by nickcw
2 days ago
Actually the fastest ones in my experience are the HTTP/1.x ones. HTTP/2 is generally slower in rclone though I think that is the fault of the stlib not opening more connections. I haven't really tried QUIC
I just think for streaming lots of data quickly HTTP/1.x plus TLS plus TCP has received many more engineering hours of optimization than any other combo.
Maybe this is one of those things where "Worse is Better" [0] given HTTP/1.x will always receive more time/attention/resources than something that might be theoretically superior but never got the resources to fulfill its promise. Cloudflare is probably one of the few organizations outside of Google with an internal economic case to support QUIC. For everyone else there is the option of paying IBM for Aspera using FASP.
0. https://en.wikipedia.org/wiki/Worse_is_better