1. A data processing system configured for optimized continuous query processing, the system comprising: a host computing system comprising one or more computers, each with memory and at least one processor; an in memory data grid (IMDG) operating in the memory of the host computing system; and, an optimized continuous query processing module coupled to the IMDG, the module comprising program code enabled upon execution in the host computing system to receive a request to add an object to the IMDG, to evaluate a continuous query upon the object in order to produce a result, to add an attribute to the object referencing the continuous query and assigning a value to the attribute of the result, to insert the object with the attribute into the IMDG, and to return the value of the attribute in lieu of repeating an evaluation of the continuous query in response to receiving a request to repeat an evaluation of the continuous query in respect to the object.