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CoreData and NSDate searches on date fields

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CoreData and NSDate searches on date fields

Subject: CoreData and NSDate searches on date fields
From: Andrew Bush <email@hidden>
Date: Wed, 17 Oct 2007 23:08:30 +1300

Hi all,

I am performing a search on a coredata field of type Date, it is a search across a date range..ie, I want every record whose start date and end dates are within the range specific.

There are many thousands of records to be compared, and the search is currently very slow.

I have added an index using the _CreateIndex tag in the attributes, and this has helped a lot, but it is still too slow for my needs.

I was wondering how the search/date storage is implemented and whether I would be better off shifting to specifying the type as a NSTimeInterval/double and searching on that?

is the date converted to a number for storage and searching anyways? or would I improve the speed by doing it manually?


thanks for any help.


Yours cheerfully,

	Andrew Bush


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