1. A compiling apparatus comprising: a static scheduling unit configured to generate a plurality of task groups that each comprise at least one task, and to allocate the plurality of task groups to virtual cores by dividing or combining the tasks included in the plurality of task groups based on execution time estimates of the plurality of task groups; and a dynamic scheduling unit configured to map the virtual cores to physical cores, wherein the dynamic scheduling unit reallocates a part of a task group with a highest execution time estimate allocated to a first physical core to a second physical core which is connected to the first physical core and to which a task group with a lowest execution time estimate is allocated.