RE: Takes long time with F4 key on package or with schema browser when user tries to view package body from other schema.

12.9 - to be released any day now (tomorrow, I think)

That query that I gave you was the one we use to load all of the packages into the Schema Browser.  The one for describe dialogs includes a variable for object name, and it's probably faster (below).

with PACKAGES as
  (Select owner, object_name, object_type, decode(status, 'VALID', 'V', 'I') status, last_ddl_time, object_id, created
   from sys.all_objects
   where 1=1
   and object_type in ('PACKAGE', 'PACKAGE BODY')
   AND    owner = :own
   AND    object_name = :obj)
SELECT PACKAGES.owner, PACKAGES.object_name, PACKAGES.object_type, PACKAGES.status,
       PACKAGES.last_ddl_time, PACKAGES.object_id, PACKAGES.created
       ,NVL(pi.AUTHID, 'DEFINER') AUTHID
       ,NVL(d.debuginfo, 'F') DEBUGINFO
FROM   PACKAGES
       ,(SELECT   object_id, authid
         FROM     sys.ALL_PROCEDURES
         WHERE    subprogram_id = 0
         AND      object_type = 'PACKAGE'
         AND    owner = :own
         AND    object_name = :obj
         GROUP BY object_id, authid) pi
       , sys.all_probe_objects d
WHERE  PACKAGES.object_id = pi.object_id (+)
AND    d.object_id (+) = PACKAGES.object_id
AND    d.owner (+) = PACKAGES.owner
order by 3