Marble/GeoData/PointerVsImplicitShare

Implicit sharing and storing objects as value is very reasonable for basic data as QStrings, but there are reasonable doubts regarding Placemarks and other GeoData. There are some possibilities:

• Don't use implicit sharing at all and store all objects on the heap with a pointer to it.
• Use implicit sharing and storing as value for GeoDataCoordinates only.
• Use implicit sharing and storing as value for all GeoData classes.

To find out which is the wisest I try to look at every single class: