Performance turing sca and osb services from developer perspective..

I am a developer developing sca composites and osb services. My services are taking 2 sec avg. I need to reduce the amount of time taken by
these services.
What are the various steps to be taken to tune SCA composites and OSB services?

Specific to OSB, please refer to http://download.oracle.com/docs/cd/E21764_01/core.1111/e10108/osb.htm#BABCIEAH
Also, you can enable monitoring on Proxy Services @ Action level (@ Operational settings) and analyze the places where its taking the most of the processing time and accordingly try optimizing those activities.
Thanks,
Patrick

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