That functionality currently does not exist, the major problem with it
would be where to store that information between startups, access would
have to granted to a directory in the file system, etc.
The usual way to speed up startup is to do component scan of subpackages
that contain only the set of classes that are scannable, or avoid scanning
altogether and use XML instead.
Also if there is an ORM framework like Hibernate involved, i helps to
turn off schema validation. Using lazy initialized beans also reduces the
startup time, there is currently no alternative to these measures to reduce