A user interface (UI) area having multiple data sources is regenerated based upon changes made to UI elements associated with the UI area. To efficiently regenerate the changed UI elements, a processor of the computer determines UI controls and data objects associated with the UI area to generate a conditional list. The conditional list includes corresponding events representing an association of the UI controls and the data objects. Based upon a modification to a data object, an optimized data binding structure is generated to determine a corresponding UI control that is affected by the modification. An updated UI controls list is computed to include the affected one or more UI controls based upon the optimized data binding structure. Based upon a trigger to render the UI area, the affected UIs are regenerated on the UI area by updating the affected UI controls based upon the modification.