Building optimized download modules leveraging modularized dependencies

A method for building a downloadable application, the method comprising:

• determining, in response to a request to build a downloadable application, a set of resources used by the downloadable application;
• reading the set of resources while building the downloadable application to determine a discovered set of resources used by the downloadable application;
• determining resource dependencies for the set of resources and the discovered set of resources;
• creating a dependency data structure according to the resource dependencies;
• and
• determining in accordance with the dependency data structure a subset of the set of resources and the discovered set of resources to include in a module associated with the downloadable application, wherein determining the subset to include in the module includes determining to include a resource in the module from the subset of resources and the discovered set of resources based at least in part on a frequency of use of the resource.