Provided is an operation method of a processor including a plurality of heterogeneous cores, the operation method including selecting an execution core of the plurality of heterogeneous cores for executing an application, loading, from a memory, first data corresponding to core information of the execution core during runtime of the execution core, wherein the first data is included in compile data, the compile data including a first function compiled for each heterogeneous core of the plurality of heterogeneous cores, the first function being a function from among a plurality of functions of the application that is at least one of frequently called or having a long execution time, and processing, by the execution core, execution codes for executing the application, based on the first data.