From: kuku@physik.rwth-aachen.de   
      
   A question about packet processing speed:   
      
   I have a server and a client which communicate via a socket (ipv4, AF_INET).   
   The client sends a connect. The server does an accept and waits   
   for further messages from the client on that socket (using select()).   
      
   The design of the higher level protocol is the following way:   
      
      
   client                                        server   
      
      
   send(REQUEST) --------------------------->    recv(REQUEST)   
   recv(DATA)    <--------------------------     send(DATA or ERROR CODE)   
   recv(END)     <--------------------------     send(END)   
      
   Now it turns out that the doubly sending of packets makes the whole   
   communication very slow and I have no idea why at the moment.   
   Each transaction in the above way takes 0.2 seconds and calculatiing alone   
   from the wire speed (100Mbit/s) for 256 bytes I would expect smaller   
   transmission times. Lowering the packet size down to 70 doesn't have   
   any impact on the time I'm achieving.   
   But when I remove the sending of the END packet, I'm getting a drastic   
   performance increase, that is the transaction goes down to 600 in 1 second.   
   A 600fold performance increase.   
      
   --   
   Chris Christoph P. U. Kukulies kukulies (at) rwth-aachen.de   
      
   --- SoupGate-Win32 v1.05   
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