On 20 Oct 2008, at 4:06 pm, DKJ wrote:
Since mutable arrays and dictionaries expand as required when new objects are added, when should one use -initWithCapacity: methods?
I'd guess they're only worth using if you know you are about to populate one with a lot of items and the performance hit of letting them grow "naturally" is worth avoiding. There may also be private classes within the cluster that are optimised for certain numbers of objects, so this will act as a hint as to which one should be used.
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