Why?
Applications usually need many stores to be filled with data. For the purposes of this explanation we can classify these stores as normal (or dynamic if you wish) where data is changed by users then it is saved to the server or new data is loaded from the server for the user to interact with. The other stores hold data that is never changed during the application lifetime - I call them static stores. These are various lists: genders, states, countries, types of other items, etc.
Now, when the application starts we have to load these stores so we usually wind up with 20-100 initial Ajax server requests. That does have a negative effect both on the client application startup time but also on the server that is loaded with many often unnecessary requests.
Live Demo
What?
Hence, what we need and want is the reduction of the number of initial server requests to the minimum.
How?
This example shows how it can be easily done. We send the initial one request asking server to deliver data for all static stores, the response is decoded, data saved and all static stores populated with their records.