Use of GUID's

[mattfysh]

The size of models stored in local storage rapidly increases when creating many models - would it be better to remove the GUID function and maintain an incremental counter when assigning new ID's?

[jeromegn]

I guess we could keep a counter stored somewhere.

As I understand it though, it would only shave off a few bytes per entry.

Truth be told, localStorage is not useful for large amounts of data. A better alternative would probably be IndexedDB. I haven't dug deep enough in those.

If you try it out and it yields significant space savings, then for sure supply a pull request :)