EventMachine Railsconf notes

eventmachine.md

Implementation of the Reactor pattern

• Most web apps are I/O bound, not CPU bound
• Instead of waiting on a response from the network, use that time to process other requests
• Handle 5-10k concurrent connections with a single Ruby process

EM.run do 
  EM.start_server '0.0.0.0', 2202, EchoServer
end

while reactor_running?
  . . .
end

#your interface module

post_init
receive_data

Never block the reactor

• no long loops
• no MySQL queries