1. A parallelization method comprising: obtaining profiling information for each job step of a job to be executed on an electronic device by performing profiling of the job; determining at least one job step to be parallelized on a central processing unit (CPU) and at least one heterogeneous unit of the electronic device among a plurality of job steps of the job based on the profiling information; determining at least part of units to process each unit data among the CPU and the at least one heterogeneous unit based on the profiling information in the determined at least one job step; and determining at least part of units to process each task among the CPU and the heterogeneous unit based on the profiling information, with respect to at least one job step including a plurality of separately executable tasks in the determined at least one job step.