A computer-implemented method of operating on a program is disclosed which includes executing at least one instruction towards method of operating a program, the execution includes receiving request for input data associated with at least one dataset; at run time determining if the input data associated with the at least one dataset is resident on memory of one or more processors of a second class (Class2 Processors), if the associated data is resident on the memory of at least one or more processors of a first class (Class2 Processors) and not resident on the memory of the Class2 Processors, i) retrieving only the associated input data from the memory of the Classi Processors, ii) copying the associated input data onto the memory of the Class2 Processors, iii) using the retrieved input data in the execution of the at last one instruction, and iv) generating output data.