title: What is the most reliable and fastest type or data structure to store data using Objective C?
body: <p>I am looking for the type or data structure to store a big number of same type primitives on my app (Mac OS X or iOS) using Objective C. As I understood NSNumber stores only one primitive (correct me if I am wrong). I have, let's say, thousands of integers or strings. <strong>Which would be the best solution to put, store and access them there?</strong> NSSet, NSArray, NSMutableArray, NSDictionary, NSMutableDictionary or something else? I know that they have different features, but I care basically only about the performance of basic operations (putting, storing, retrieving).</p>