Some of the SPSProfessional webparts as SPSRollUp, Navigation WebParts or SPExplorer WebParts, now have a cache option. This cache improves the performance of these applications.
To manage the cache options, you will find, in properties, a new section called "Cache Settings"
In this section you can enable and disable the cache as well as specify the cache lifetime.
Operation
The cache allows a webpart to store certain results in a specified period of time. In the SPSRollUp, the cache stores the crawling results, avoiding repeating the process every time the page is loaded; in Navigation or in SPExplorer, it is the folder tree what, is stored in the cache.
This cache is shared by all users and can be set up separately in each webpart.
If we have a page with a SPSDocumentExplorer webpart, where we have activated the cache during 180 seconds (3 minutes) the user who loads the page first will do the hardest job, forcing the folders search. This cache is kept during the established time (3 minutes), if another user from another site loads the same page before the cache has expired, the returned values will come from the cache.
After the established time (3 minutes), the first user who loads the page will force the reconstruction of the folder tree.