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From "Shazron Abdullah (Commented) (JIRA)" <>
Subject [jira] [Commented] (CB-402) Improve Contacts search taking a long time by using (NSArray*)filteredArrayUsingPredicate:(NSPredicate*)predicate
Date Wed, 28 Mar 2012 00:31:21 GMT


Shazron Abdullah commented on CB-402:

Predicate Programming Guide:
> Improve Contacts search taking a long time by using (NSArray*)filteredArrayUsingPredicate:(NSPredicate*)predicate
> -----------------------------------------------------------------------------------------------------------------
>                 Key: CB-402
>                 URL:
>             Project: Apache Callback
>          Issue Type: Improvement
>          Components: iOS
>            Reporter: Shazron Abdullah
>            Assignee: Shazron Abdullah
> We have to analyze this first to see if it is a big problem, with a huge N. I believe
it is.
> Right now our search method is O( n ), while using Apple's search method it is possibly
O( log n ) - but that's just a guess if I assume internally they use a binary search.
> Steps:
> 1. Grab all the contacts in a NSArray through ABAddressBookCopyArrayOfAllPeople
> 2. Construct a NSPredicate for the filter, and call filteredArrayUsingPredicate on the
NSArray returned in step 1.
> 3. Convert the NSArray returned in step 2. to our CDVContact objects

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