This is a somewhat subjective question in that it can only be answered in terms of the experience of oneself and other developers.
I used both JSONKit
and NSJSONSerialization
and really prefer the latter. Regardless of what the benchmarks indicate, I did not notice a difference in speed in everyday use. However, I'm also used to doing my deserialization in the background thread, so speed differences may not show up in the user interface.
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