为Ruby编写正确的Eventmachine代码？

| 我正在尝试了解Eventmachine。我有一台服务器：

module EchoServer
  def post_init
    puts \"connected\"
  end

  def receive_data(data)
   puts \"Receiving data: #{data}\"

   GenericModel.create!(:text => data)
  end

  def unbind
    puts \"disconnected\"
  end
end

EM.run do
  EM.start_server \'127.0.0.1\', 1234, EchoServer
end

和一个客户：

class Echo < EventMachine::Connection
  def post_init
    send_data \'Hello\'
  end

  def receive_data(data)
    p data
    close_connection
  end

  def connection_completed
    puts \"connection completed\"
  end

  def unbind
    EventMachine.stop
  end
end

EventMachine.run {
  EventMachine.connect \'127.0.0.1\', 1234, Echo
}

我想知道的是：数据库访问速度往往会变慢，那么我应该如何重写这行GenericModel.create!的代码，以免减慢反应堆循环？