BizTalk Run time

Hi,

How can we reduce the biztalk solution run time?

I have developed an biztalk application to process PO.It does the following

1. Get the input xml (2 way HTTP Receive port)
2. Update 2 tables in oracle(using oracle package so oracle adapter)
3. send the message to Direct port(HTTP)- Direct port has out bound and inbound map
4.Get the response and update those 2 oracle table with different status
5.return the response to receive http port.

I have 3 maps, one for contruct oracle update messages, 1 for map vendor request from our standard and other for map vendor response to our standard. I have correlated few variables to use to filter req at send port.

It takes almost 4 sec to do this. We already have an vb application which does all these within a sec. 

How can we save times on biztalk application? Is there any way to update oracle table without using oracle adapter? I think that is also consuming time.

Thank you in advance.

Siva