[TYPO3-mvc] Limit the "depht" of object relations

[Jan Kornblum]

Dear newsgroup,

is it possible to limit the "depht" (don't know a better word for it) 
of object relations in extbase 1.3?

Owner <-1:n-> Car <-n:1-> Manufacturer

The relations above both are bidirectional. Now i get all $owners from 
the repository:

$owners = $ownerRepository->findAll();

When i now "var_dump($owners)" in the debug window i can see each 
owners cars, for each car i can see its manufacturer, for each 
manufacturer i can see its cars, for each car i can see its owner - and 
so on seemingly infinite.

I ask this because my application seems to be very slow (when typo3 
cache is disabled) and i could imagine that might depend on building 
all the nested objects / the objects relations in both directions.

Can i limit the level depht extbase builds the nested objects? Or is my 
example the "candidate" for "lazy loading"? As far is i know this is 
not yet possible in extbase 1.3, istn't it? In my application i do need 
the "dephtness" only 3 levels...

Kind regards, Jan