question on IPC vs TCPIP

Does postgres have an equivalent C level (or ODBC) parameter so you can use IPC for local to db server only code?
http://pic.dhe.ibm.com/infocenter/db2luw/v10r5/topic/com.ibm.db2.luw.apdv.cli.doc/doc/r0008807.html

There is a measurable reduction in elapsed time for my code when I specify IPC. My code uses:
node.js
https://npmjs.org/package/odbc
db2

Thanks!!