Client Non-blocking

[kapilb1210]

In our application, we are integrating server and client together.
Whenever we get a new request on the server, then we send multiple (GET/POST) requests to external servers.

Right now we have found that the proxygen client is behaving as blocking. Is there any way to make it async?

This is impacting the performance as the latency from the external server is high.
Please provide any example.