A method, a system and a product for performing a processing operation with respect to a first data object. The method comprises obtaining a second data object, which comprises a second set of attributes and values thereof different than the first set of attributes and values thereof of the first data object; identifying, in the first and second sets of attributes, a shared attribute, each of which having a corresponding shared value; obtaining a complete list with respect to the shared attribute; and in response to determining that a number of entries in the complete list that comprise the corresponding shared value for each of the at least one shared attribute is exactly one, processing the second data object as part of the processing operation of the first data object; and avoiding processing in the processing operation additional object; whereby reducing an overall processing time and an overall storage required for performing the processing operation.