[TYPO3-mvc] Extbase performance optimization

[Jan Kornblum]

Dear newgroup,

i've got an extbase extension (cachable plugins) which is really really 
slow as soon as the page cache has been cleared.

The extension contains 3 domain objects, wich are bidirectional related 
(Category <1:n> Car <n:1> Shape). Table "Car" contains about 2.500 
records, both other tables only for about 100 records.

After the cache has been cleared, there are response times round about 
10 - 20 seconds given. Cached pages instead are offered very fast. As 
there are about 4.000 possible uri's generated by the extension. If the 
client just inserts one new record, all cached pages are lost and even 
using a crawler to rebuild the cache takes hours...

What can i do to get better response times for not yet cached pages?

Kind regards, Jan