Your sequence diagrams aren't very good at showing the actual latency cost of using HTTPS over TCP. They need to show the TCP setup and TLS setup separately at a minimum.
Also, I would show them side-by side, with markers on the h2 graph showing when the "slow" h2 requests can be made, and when the "fast" h3 requests can be made.
Your sequence diagrams aren't very good at showing the actual latency cost of using HTTPS over TCP. They need to show the TCP setup and TLS setup separately at a minimum.
Also, I would show them side-by side, with markers on the h2 graph showing when the "slow" h2 requests can be made, and when the "fast" h3 requests can be made.