Modifying the call frequency in javafx early optimization

I am working on a code to improve the performance in javafx. What are the best aspects of optimization early as possible in code development? How to make calls for every change committed in javafx? How to change it so that calls can be made once for each frame rather than for each change? How are events helpful in modifying the javafx code for code optimization? Can anyone guide me in generating an event for the same? Can I utilize java nodes for the purpose?