function result cache for pl/pgsql

I was thinking about pl/pgsql and comparing it with pl/sql function result cache,
featured in Oracle 11g - see

http://www.oracle.com/technology/oramag/oracle/07-sep/o57plsql.html

Is it possible to get pl/pgsql function result cache functionality into PostgreSQL?

I am not that familiar with the pgsql internals to hack this only by myself.

Best,
Pete

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