The computer can include a memory system having a plurality of memory cells readable and writable by the processing unit and including a least a first group of memory cells of a same speed grade. A plurality of copy regions each having a corresponding portion of the memory cells of the first group, and a distinct combination of copy unit and copy factor, the copy unit corresponding to a given amount of memory cells. The processing unit can be configured to obtain an indication to copy a data structure stored in the memory system; associate the data structure to one of the copy regions based on the corresponding combination of copy unit and copy factor; copy the data structure to the associated copy region in a number of copies equal to the corresponding copy factor;and successively access different ones of the copies of the data structure.