System and method for improving a working set

This invention is directed to a method and system for arranging code blocks of a computer program to reduce paging during the execution of the program. The system comprises an optimizer that receives a compiled computer-executable program in binary format (binary code). After receiving the binary code, the optimizer generates a weighted control flow graph (CFG) and creates a ranked list of edges based on the information disclosed by the weighted CFG. The optimizer then engages in a partitioning process where the blocks associated with each edge are assigned to a particular partition according to the ranking of the edge. The partitioning process then enters into another level by treating each partition as a code block and repartitioning the new code blocks. The optimizer repeats the partitioning process until some threshold number of edges belong to a single partition. Then, the optimizer rearranges the code blocks according to the layout of the blocks in the partition and outputs the optimized computer-executable program.