Comparison of JSON Parser for Objective-C (JSON Framework, YAJL, TouchJSON, etc)

As far as I know, there are three JSON Parsers for Objective-C, JSON Framework, YAJL, and Touch JSON. Then, These three would have their own characteristics.

For example:
YAJL can be used as a SAX style parser.
JSON Framework has relatively long history and is widely used.
Touch JSON parses NSData instead of NSString.

In addition, as far as I tested, the result of performance comparison is as follows:
[fast] YAJL > JSON Framework > Touch JSON [slow].

If you know pros and cons of these JSON parsers, could you tell me?
Lastly, if you know any other JSON Parser, please tell me.

Solution 1:

If you're looking for speed, take a look at JSONKit. It is (usually) much faster than the already mentioned JSON libraries, often an order of magnitude faster. And because of it's "recently instantiated object cache", it will (again, usually) use less memory as well.

Solution 2:

Considering a comparison that I did, the fastest library is JSONKit, followed by NSJSONSerialization (now public API) and NextiveJSON. SBJSON and TouchJSON are a little bit slower than the previous 3 libraries.

The comparison has been done using an iPhone 4S with iOS 5.0.1.