A method, system and computer program product for optimizing performance of an application running on a hybrid system. The method includes the steps of: selecting a first user defined operator from a library component within the application; determining at least one available hardware resource; generating at least one execution pattern for the first user defined operator based on the available hardware resource; compiling the execution pattern; measuring the execution speed of the execution pattern on the available hardware resource; and storing the execution speed and the execution pattern in an optimization table; where at least one of the steps is carried out using a computer device so that performance of said application is optimized on the hybrid system.