class EventMachine::EvmaUDPSocket

def eventable_read

performance.
If we have it, then we can read multiple times safely to improve
Proper nonblocking I/O was added to Ruby 1.8.4 in May 2006. 
def eventable_read
  begin
    if io.respond_to?(:recvfrom_nonblock)
      40.times {
        data,@return_address = io.recvfrom_nonblock(16384)
        EventMachine::event_callback uuid, ConnectionData, data
        @return_address = nil
      }
    else
      raise "unimplemented datagram-read operation on this Ruby"
    end
  rescue Errno::EAGAIN
    # no-op
  rescue Errno::ECONNRESET, EOFError
    @close_scheduled = true
    EventMachine::event_callback uuid, ConnectionUnbound, nil
  end
end