UDF bad performance

[Justin Taylor <JUSTIN@xxxxxxxxxxxxx>]

I have this UDF that returns an integer:
BEGIN
                RETURN CEILING ( LENGTH * WIDTH * HEIGHT / 166 ) ;
END

Calls to this UDF take a lot longer than I expect (about 21x longer than an index-based SELECT statement).  I checked all the parameters, and the data types match verbatim so there shouldn't be any implicit conversions.

Any suggestions?


TIA