In some implementations, a user interface for an application is displayed using a web browser instance on a client device. An input is received to present data on the user interface in a particular view. In response to the input, a first web worker thread corresponding to the web browser instance obtains data from a server, and executes first library routines to store the data in local storage at the client device. A second web worker thread, which corresponds to the web browser instance and the user interface, accesses the data from the local storage by using one or more second library routines, and processes the data to convert to a presentation format corresponding to the particular view. The second web worker thread stores the processed data in the local storage by using one or more third library routines, and provides the processed data for display on the user interface.