Can't accept new conn if first conn do not call Read()

[adwpc]

dtls/internal/net/udp/conn.go

Line 129 in 34883a7

conn.sizeCh <- n

can't accept new conn if first conn do not call Read()

dtls/internal/net/udp/conn.go

Line 180 in 34883a7

n := <-c.sizeCh

[adwpc]

https://github.com/p9c/kcp/blob/b7d5985a4fa3ccea6dfe8d276a6946c44f736362/readloop_linux.go#L117

ReadBatch api may be a good performance

[Sean-Der]

@adwpc nice find, I can look into this! I consider this a bug, I think people expect this work like Go's http server (you can have multiple going at a time)