FunctionCall2 performance

I was comparing the oprofile results of our OLTP workload between 
7.5devel and 8.0beta3 test and noticed a new FunctionCall2 in the
8.0beta3 profile that's on the top of the list for PostgreSQL.  I
see about an 32% decrease in overall performance.  Any suggestions
for determining if FunctionCall2 is really having that kind of an
impact on the test?

Links to results are here:
7.5devel - http://www.osdl.org/projects/dbt2dev/results/dev4-010/128/
8.0beta3 - http://www.osdl.org/projects/dbt2dev/results/dev4-010/180/

Unfortunitely, I lost the database parameters for 7.5devel. :(

-- 
Mark Wong - - markw@osdl.org
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