A computer-implemented method of user interface control includes receiving request to display data in a user interface and displaying data in a visible part of the user interface. Data requests in a hidden part of the user interface can be assigned to bins. Data requests assigned to a first bin can be transmitted to the backend computing system and a responsive output of the backend system can be displayed in the user interface. If the display request is still active and all of the data requests assigned to the first bin have been transmitted, data requests assigned to a second bin can be transmitted to the backend computing system and a responsive output of the backend computing system can be displayed in the user interface. Related apparatus, systems, techniques and articles are also described.