The Unity Dependency Injection Tool from Microsoft has a new installer this week as well as a new API for configuring injection so that you no longer need to add attributes to your classes to signal constructor, property, and method injection.
From a performance standpoint, Chris also mentions that "the locking approach in the PolicyList was reworked to remove the read locks. This slows down the write case, but in general usage reading policies happens far more often than writing. The change reduced our thread contention rate by over 90%."
You can read more about the changes to Unity as well as download the weekly drop here.
Unity Tutorials