framework and asynchronous networking library, originally developed at FriendFeed. By using non-blocking network I/O, Tornado can scale to tens of thousands of open connections, making it ideal for long polling framework and asynchronous networking library, originally developed at FriendFeed. By using non-blocking network I/O, Tornado can scale to tens of thousands of open connections, making it ideal for long polling blocks when it waits for something to happen before returning. A function may block for many reasons: network I/O, disk I/O, mutexes, etc. In fact, every function blocks, at least a little bit, while it is running

originally developed at FriendFeed [https://en.wikipedia.org/wiki/FriendFeed]. By using non-blocking network I/O, Tornado can scale to tens of thousands of open connections, making it ideal for long polling loop tornado.iostream — Convenient wrappers for non-blocking socketstornado.netutil — Miscellaneous network utilities tornado.tcpclient — IOStream connection factory tornado.tcpserver — Basic IOStream-based originally developed at FriendFeed [https://en.wikipedia.org/wiki/FriendFeed]. By using non-blocking network I/O, Tornado can scale to tens of thousands of open connections, making it ideal for long polling