appleguy 0a5c1f43a8 [ASRunLoopQueue - Performance] Add ASDeallocQueue for efficient object teardown. (#2399) ...

* [ASRunLoopQueue - Performance] Add ASDeallocQueue for efficient object teardown.

This measurably reduces block overhead and context switching.  In the layout benchmark,
it increases ops/s while actually reducing CPU utilization.  This suggests that we are
now at a lock-bounded local maximum, at least for tri-core devices.

* [ASDeallocQueue] Update convenience helper method and adopt in ASImageNode etc.

* [ASDeallocQueue] Reimplement the queue using a timer-based runloop.

* [Debugging] Re-enable ASDisplayNode Event Log.

* [ASDeallocQueue] Final refinements, comments, code minimization.

* [ASDeallocQueue] Fix for lock release needed in early return (refactoring typo from last commit)

2016-10-17 12:24:11 -07:00

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