Logging Framework for Mac OS X and iOS.
The lumberjack framework is fast & simple, yet powerful & flexible.
It is similar in concept to other popular logging frameworks such as log4j, yet is designed specifically for objective-c, and takes advantage of features such as multi-threading
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, grand central dispatch (if available), lockless atomic operations, and the dynamic nature of the objective-c runtime.
In most cases it is an order of magnitude faster than NSLog. [Less]