In one example of the disclosure, an index of content of a set of websites and an archive of at least a portion of the content are caused to be created. A search of the index and the archive are caused to obtain performance data with respect to each of a set of application components. For each of the application components, a performance rating for the application component is determined based upon the performance data. Usage data indicative of a subject application component included within the set of application components is obtained. A warning is caused to be provided for display responsive to a determination that a performance rating associated with the subject application component is not acceptable in comparison to a threshold performance rating.
