Performance of sockets vs pipes

Question

I have a Java-program which communicates with a C++ program using a socket on localhost. Can I expect to gain any performance (either latency, bandwidth, or both) by moving to use a native OS pipe? I'm primarily interested in Windows at the moment, but any insight related to Unix/Linux/OSX is welcome as well.

EDIT: Clarification: both programs run on the same host, currently communicating via a socket, i.e. by making a TCP/IP connection to localhost:. My question was what are the potential performance benefits of switching to using (local) named pipes (Windows), or their Unix equivalent (AF_UNIX domain socket?).

Answer 1

Ken is right. Named pipes are definitely faster on Windows. On UNIX & Linux, you'd want a UDS or local pipe. Same thing, different name.

Anything other than sockets will be faster for local communication. This includes memory mapped files, local pipes, shared memory, COM, etc.

Answer 2

The first google hit turned up this, which clocked NT4 and XP and found named pipes (that's what you meant, right?) to be faster on Windows.