Enhance REST call in OIC Integration

Summary:

Enhance REST call in OIC Integration

Content (please ensure you mask any confidential information):

I'm looking for some ideas on how I can improve the performance of a Scheduled Integration I have that is making a REST web service call with a request parameter, and also receives a JSON response back.

We currently have For-Each looping construct setup, and the REST call sends one Item Number per iteration of the loop. So if I have a list of 30 items numbers I want to submit to this api, I have to call it 30 separate times from the loop. The step immediately after the REST call (still in loop) is a SQL Update call to ATP database to update each item's status based on the REST responses.