Hello again as well :)
You are right, the form.Get() method retrieves schema data about a particular form, which is also used when populating the application cache - this happens after changes occur in an application.
The "speed" of this cache update depends on how large an application is and is (usually) limited by how fast the database system can deliver the requested data.
On what kind of system are you editing your applications? We usually run a local R3 instance on our personal computers for building apps and then deploy to production machines for normal use. That tends to give the best performance but depends on your infrastructure and your options.
