Explore usage of kafka broker for holding profiling data

[emilsoman]

Instead of sending profiling data to the client in realtime over zeromq sockets, if we can send the messages to kafka, it allows the client to consume the data at its own pace. This route is worth exploring.

[stereobooster]

There is also https://github.com/nanomsg/nanomsg, which promise to be faster than zeromq. And https://capnproto.org/ should be faster than msgpack