On 28 Feb 2013, at 14:41, Kyle Sluder <k...@ksluder.com> wrote:
>  
> All you have shown is that NSKeyedArchiver is not optimized for your 
> contrived use case.

Whenever some object is used (referenced from some other object) n times there 
are n-1 unnecessary object references created.
This might happen in real world examples. The (rather contrived) example of an 
archive containing a million identical string objects was just created to 
emphasise the problem.

For equal but distinct string objects (i.e. a ≠ b and [ a isEqualToString: b ] 
= YES) NSKeyedArchiver will store both a and b. As this is probably not 
occurring very often (and checking all strings can become quite slow) this is 
ok.

Kind regards,

Gerriet.


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