The RSS Toolkit automatically includes built-in caching logic so that RSS feed data is cached locally instead of fetched each time it is accessed/used.  The RSS Toolkit supports caching this information both in-memory, as well as persistently to disk (for example: to survive worker process restarts or application resets). 

The benefit of this built-in caching integration is that you can efficiently subscribe and pull RSS data from a variety of remote sources without having to worry about your server blocking on remote network calls all the time.  Note that the RSS toolkit by default uses an RSS channel’s TTL setting to control the cache duration semantics for you.