How to analyze function performance

  Hello,

  Is it possible to somehow analyze function performance? E.g.
we are using function cleanup() which takes obviously too much time
to execute but I have problems trying to figure what is slowing things
down.

  When I explain analyze function lines step by step it show quite
acceptable performance.

  PostgreSQL 8.0 is running on two dual core Opterons.

  Thanks,

  Mindaugas