“Underlying the HTTP protocol are sockets for sending the data – each request is treated as a distinct event so a socket is created and destroyed to return the response. A better way is to hook into this lower level and use sockets directly – each client then has a unique connection on the server, and data can be sent in both directions. Also the server is told when the socket is disconnected so things can be cleaned up…”
http://www.pawfal.org/dave/blog/2012/07/websockets-vs-http/
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