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Need of an Apple Engineer. Core-Data Issues
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Need of an Apple Engineer. Core-Data Issues


  • Subject: Need of an Apple Engineer. Core-Data Issues
  • From: malcom <email@hidden>
  • Date: Wed, 29 Mar 2006 10:53:17 +0200

Is there an Apple Engineer here?
I would to talk about Core-Data performance issues but there is not
any reply from Apple. I have this modeled structure (in fact you could
make a typical tutorial):

http://www.rietiforum.com/imageupload//images/7249m1.png

It's a newsgroups modeled store.
To avoid long time loading (about 10 seconds in my MacBookPro...I
would not image what's happend on an "old" machine) I've tried to set
my old attributes as releationships.
With this technique I've saved a bit of time. Now it takes "only" 3
seconds at first fetch and during the other fetch results are
instantaneous (why? is there a sort of cache or what?).
However it still slow and I don't know why... in fact I've a new
machine. If this computer it takes about 3 seconds in a g4 800 it will
take 10?15?
Is there a way to avoid this problem?
The performance guidelines inside CD programming guide is pretty short
and not detailed. My db with 8000 records weight about 15mb. It
contains article's subject, headers and body (strings).
Need I to move body in another persistence store?
Is core-data made for "medium" size projects? (what mean medium? 15mb
seems to be small in my opinion)
Please anyone from Apple could reply to me?
Thank you very much
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