How To Optimize Integration Pacakages Or Best Practices For Integration Services

Hello friends.
I managed to design an Integration service package,but the desired level of performance has not been achieved(i.e it is performing slow).
So I want to know what are the best practices for optimized solution .
In my package I'm exreacting data from XML file and Storing it in SQL server database with some processing dring data flow.

I'm using
1) Two Script Task Control -In these control,I m opening the connection to XML file through VB.net code and
iterating each record at a time.
2)Two OLE DB Command -Each fetched record from script task component is processed in OLEDB command through
stored procedure and then inseted into database.
3)One for Loop -This loop contains two script Task control and two OLEDB Command control,
(mentioned above),for fetching single record and inserting it in database.
4)One derived Column
5)One Multicast
6)One Character Map
7)One OlEDB Source

As with my current performance I'm able to insert one record in every .5 second (Which is much below to acceptable limits)
Is control lying disabled on SSIS designer pane also affect the performance of execution.