akka/akka — pull request #1643 by octo47 (2013-08-15 11:07:57+00:00)
Title: Resolves high contention on unsubscribeAddresssTermination #3547

Looks like we can reuse existing function, which does exactly what we need: checks are there any nonlocal watches exist in given actor, and iff they are - call unsubscribeAddressTermination.