Subject: Re: very slow TCP connection on localhost
To: Manuel Bouyer <bouyer@antioche.eu.org>
From: Steven M. Bellovin <smb@cs.columbia.edu>
List: tech-net
Date: 09/06/2006 10:48:08 
The retransmissions are, I suspect, the key.  If TCP has to retransmit,
it's because a packet or its acknowledgment got lost; TCP in turn
interprets that as due to congestion and backs off.  The question, then,
is why packets are getting lost.  Does 'netstat -i -d' show any drops on
lo0?