About slow

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1

Listing large number of complicated objects with paging.

.setFirstResult(start).setMaxResults(count).getResultList(); is quite slow. Well, after first request
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Low performance when getting grove roots

with the same DB, I see the original behavior (working but slow).   Providing the test case would take some time.   Regards, Vladimir tsichevski
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Navigation to Collection Elements

] ? If such navigations in queries lead to performance penalty, how slow is it and would you recommend
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query.getResultList() throws ClassCastException

'id' before 'commit'.  This caused the ID lookups on non-existent entities to be "slow
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1

Remove a modified entity cause an optimistic lock exception

your question, but the size of the OSGI test case makes progress very slow. Thanks for writing a minimal
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1

Selective merge/cascade of detatched entity

to this with me, Phil Thank you for the test program. It definitely demonstrates activity that is too slow
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1

Should I be able to persist a JFrame (or gui components in general)?

" interfaces like this, so that I am not spending a long time (I'm slow) programming what I'll call "mapping
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Should I use ObjectDB and JDO?

than JPA because I am storing objects to avoid apparent relative slowness of relational databases).  I want
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significant performance decrease

An additional index on childNodes should help. If it is still slow, try also composite indexes
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1

Storing Images and Object Pooling

(); Producing everytime ResultList ( Garbage collection destroy and remake ) slows apps i think. I think