I will release a change to GetFavorites() the coming days.
A while back I made changes to GetOldestCaches/GetHighestCaches/GetLowestCaches so that the script writer can choose which DB cluster to use, by setting alternativeDBCluster to true (false is default).
When setting it to true a DB cluster better at digging deep and processing lots of data will be used. But leaving it to false is better if DB indexes can be used well.
The reason to the change was triggered by
https://project-gc.com/forum/read?8,85610,85610.
So currently GetFavorites() defaults to the alternative DB cluster. With the new patch it will instead default to the standard cluster. If you know you are using the function in cases where country isn't used for filter, it might be worth testing and comparing speed between the two clusters.