@lavanya.kannan -- they are stored in the "Local Storage" of the Browser that you use. They aren't sync'ed to the database in any way. They're rather inaccessible, hard to backup, and hard to share. Especially with some slowdown occurring to Brows...
I am having this same issue. As soon as I log into the cloud, all of my queries and my interface become very slow. I have to log out and clear all cache for the interface to work well again. This is not great, because I would really love the cloud...
