AnalogX FastCache is a caching DNS server that runs on your local machine and handles any DNS request that your computer makes, from Internet Explorer to your favorite FTP client. Once a query is made, FastCache will override the normal timeout for the item with one that you specify, so instead of saving a query for a couple of seconds, it can save it for a couple of days. Now every time you ask for it again while it's in the cache, it gives it to you instantly.