I've been engaged in one of the major assignment with regards to the integration of SAP ECC ISU system with thrid party web services. I have an option to use the SAP PI -Middle Ware for the integration purposes for both the systems.
Performance is the critical point, want to ask which option would the performance boost with regards to the integration of systems, as there are multiple options available IDOC, BDOC, BAPI through RFC, Proxy or SOAP?
Please share with the rational behind each integration option with regards to the performance.