Streaming support over HTTP3/QUIC

[mrb1090]

I have a high performance REACT/TS web app. Looking to optimize data transfer in a moderate (30ms RTT) latency environment. Curious if grpc-web has streaming support over HTTP3?

[sampajano]

@mrb1090 Thanks for checking. gRPC-Web is transport-agnostic and does not specify which underlying HTTP protocol should be used when connecting to the Envoy proxy. So, HTTP/3 could certainly be used between the browser and the Envoy proxy (you need to configure Envoy properly and expose Alt-Svc correspondingly).

HTTP/2 will still be used for the traffic between Envoy proxy <-> gRPC server, but that should be within your server stack, so H3 v.s. H2 should have a negligible difference. (Although I don't have data on the overhead of proxy performance, so you might need to test it out yourself.)

Hope that clarifies it for you. Thanks :)