Buffer in TCPSocket when communicating via 127.0.0.1?

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I'm using the TCPSocket.send, TCPSocket.gets and TCPSocket.gets to
make communication between a ruby script and a C program in Linux. I'm
experiencing some troubles with synchronization and lag.
There is no problem with the C program; it's working fine.

There is any buffer in TCPSocket when communicating via 127.0.0.1?
Where I can read anything about this ?

Thanx!

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