e</code> <em>manages its state</em>.</p>
<p>This separation of concerns not only clarifies the architecture of your app,
it can also improve its efficiency.
This is particularly true when your app needs to be booted repeatedly during testing
and / or server-rendering (e.g. via <a href="https://github.com/tildeio/ember-cli-fastboot">FastBoot</a>).
The configuration of a single <code>Application</code> can be done once
and shared among multiple stateful <code>ApplicationInstance</code> instances.
These instan