When working with very large business component projects it may be useful to load only those packages that are of immediate use. This can be accomplished by enabling lazy loading of business components. Lazy loading will load business components as they are required. If this checkbox is not selected, all Business Components are loaded immediately upon startup.
This runtime feature is also available by modifying the server.properties file.
You can also improve performance by explicitly stating which packages are to be loaded before starting JDeveloper.