Application code for deployment to a client over a data link is optimized to minimize download time by supplying only the application code with a particular object that is required by the object. In a web application that includes multiple pages, the HTML and JAVASCRIPT are scanned to identify code resources called by a particular web page. When all called resources are identified, they are extracted and concatenated into a single resource file. When the page is downloaded to the client, the import file is included with the page. The import file may be cached so that it need only be downloaded once, rather than being downloaded every time the page is requested. The invention is suitable for use with other interpreted scripting languages.