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Core Data Performance

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Core Data Performance

Subject: Core Data Performance
From: Keith Wilson <email@hidden>
Date: Wed, 23 Jan 2008 16:37:34 +1100

How do I query (from Objective-C) whether a physical SQLite store contains the new indexes for Entity Subtypes?

There has been a dramatic improvement (100+ times) under Leopard when accessing Entity Subtypes because the Relationships are now correctly indexed in an SQLite store.

I have customers who created their databases under Tiger and others who created their databases under Leopard. So if the user is using Leopard AND it is an old Tiger database (without subtype indexes) then I want to tell the user how to get the performance improvements available on Leopard - in my case dump an reload the data. Some customers only have small databases or do not make heavy use of these indexes so they will not be told anything.

Any clues?

Keith
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