Hi,

I just noticed that the latency for simple CVS commands when contacting a remote server is quite high, for example on a repository with only one file, where the server is on the local machine but accessed through a pserver:

$ echo $CVSROOT
:pserver:cf@localhost:/tmp/cvsroot
$ time cvs log bar
cvs log: Logging bar

real    0m0.095s
user    0m0.004s
sys     0m0.000s

The problem is that neither the client nor the server set TCP_NODELAY on the socket, and given the CVS protocol, this can result in high latency (see https://en.wikipedia.org/wiki/Nagle%27s_algorithm#Interactions_with_real-time_systems).

The attached patch sets TCP_NODELAY both client and server-side, and results in much lower latency:

cf@thinkpad:/tmp$ time ~/ccvs/src/cvs checkout bar
cvs checkout: Updating bar

real    0m0.020s
user    0m0.008s
sys     0m0.000s

Cheers,