[Fastcgipp-users] Question about Fastcgi++ mechanism

[lxs567890]

 Hi, all guys
Right now I'm using fastcgi++ to implement communicating with the Nginx server.
According to the documentation I know this framework is implemented on the Boost:asio. Now I'm confused why fastcgi++ can simultaneously handle multi-request in single process which may have completed logic. 
And I know the fastcgi is to release the preasure of Nginx to the backend.

Thanks