This is a (partial) implementation of the QUIC Perf Protocol.
go run cmd/main.go -run-server=true -server-address=0.0.0.0:<server port>
A pprof endpoint is available at port 6060.
go run cmd/main.go -server-address=<server ip>:<server port> -upload-bytes=<N> -download-bytes=<M>
A pprof endpoint is available at port 6061.