JDK-6533307 : (coll) Optimize AbstractList range checking
  • Type: Bug
  • Component: core-libs
  • Sub-Component: java.util:collections
  • Affected Version: 7
  • Priority: P3
  • Status: Closed
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2007-03-12
  • Updated: 2012-10-08
  • Resolved: 2011-05-18
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JDK 7
7 b15Fixed
Related Reports
Relates :  
JDK-5103956 - (coll) Suggested improvement to speed up ArrayList get and set calls
Description
The same kind of optimization used in ArrayList for

5103956: (coll) Suggested improvement to speed up ArrayList<E> get and set calls

can be made in AbstractList.  This will be used by many classes that
extend AbstractList, e.g. the one returned by ArrayList.subList.
Comments
EVALUATION Yes. This gives us a 15-50% performance win on get/set operations on ArrayList sublists with the client compiler.
12-03-2007