Adrien Grand created LUCENE-5792:
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             Summary: Improve our packed *AppendingLongBuffer
                 Key: LUCENE-5792
                 URL: https://issues.apache.org/jira/browse/LUCENE-5792
             Project: Lucene - Core
          Issue Type: Improvement
            Reporter: Adrien Grand
            Assignee: Adrien Grand
            Priority: Minor
             Fix For: 5.0, 4.10


Since these classes are writeteable, they need a buffer in order to stage 
pending changes for efficiency reasons. The issue is that at read-time, the 
code then needs, for every call to {{get}} to check whether the requested value 
is in the buffer of pending values or has been packed into main storage, which 
is inefficient.

I would like to fix these APIs to separate the writer from the reader, the 
latter being immutable.



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