soffes/SAMRateLimit — pull request #3 by carlj (2013-08-08 20:02:09+00:00)
Title: nil block after execution

Maybe it is better to nil the block after execution to prevent retain cycles.

Source: [Should I set block reference to nil AFTER execution?](http://stackoverflow.com/questions/14633466/should-i-set-block-reference-to-nil-after-execution)