1. A memory management method comprising: loading an object oriented application into a computer memory, the object oriented application including a plurality of nodes in a classification tree, the nodes including key value pairs; aggregating the nodes in the classification tree, the aggregating performed by a computer, the aggregating including: eliminating redundant keys; and creating a composite node; loading the composite node into the computer memory; and removing the plurality of nodes in the classification tree from the computer memory in response to loading the composite node into the computer memory.