Simple project for example how to create a MKSnapShotter with MKPolylines (path on the map) and cached it. So, it make the performance scroll higher.
Xcode: >= 8.3.2
iOS: >= 8.0
indyfromoz/MKSnapShotter-With-MKPolylines-UITableView-Example
A small example on how to create MKSnapShotter with MKPolylines
Swift