DBMS_PROFILE
The profiler provides us with a source code tuning for our PL/SQL applications. It is still a unknown feature for developers and DBA’s. In the past, you would tune your PL/SQL applications using SQL_TRACE and TKPROF or by using dbms_output. Well, you no longer have to do this. There is a DBMS_PROFILER package available as of oracle 8i version.