Execution of a function execution request is performed by a server, where the receives the function execution request, which includes a set of functions and a sorting criterion. The server identifies, from the received function execution request, the set of functions included in the request, and reads the sorting criterion included in the received request. The server then sorts the identified set of functions included in the function execution request using the read sorting criterion, and executes the identified set of functions sorted in the sorting step based on a sorted order.