This is a great youtube video from Skeleton Key regarding WAN (wide area network, internet) performance for FileMaker Server 12. If you are developing a FileMaker solution that is going to be hosted on the internet for access from FileMaker Pro or FileMaker Go, then this webinar is a good thing to watch.
Many clients bring databases to us for hosting from a LAN (local area network) and soon realize that things run much slower. There are many things that you can do to your database to improve WAN performance. There are many in this video!