1. A computer-implemented process for computing excluded data, the computer-implemented process comprising: identifying a web page of interest to form an identified page; loading the identified page a first time to form a first load; responsive to a determination that a delta has not been computed for the identified web page, loading the identified page a second time to form a second load; determining whether portions of the first load differ from portions of the second load; responsive to a determination portions of the first load differ from portions of the second load, identifying the portions that differ to form a delta; storing the delta to form a stored delta; and excluding the stored delta from a document object model associated with the identified page to form a modified document object model.