Merge

6898220: Optimize Formatter.parse (including String.printf) Summary: Create fewer objects when parsing Reviewed-by: sherman Contributed-by: Daniel Martin <dtm@google.com>

6897553: LinkedList performance improvements Summary: LinkedList of size N creates N+1 instead of N+2 objects. Comparing against null is faster than comparing against sentinel node Reviewed-by: dl, jjb, forax

6897993: (se) Close or cancel performance issue when number of pending updates is high (lnx) Summary: Use O(1) Iterator instead of O(N) operations on LinkedList updateList Reviewed-by: alanb Contributed-by: Igor Chernyshev <igorc@google.com>