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From "Adrien Grand (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LUCENE-4643) PackedInts: convenience classes to write blocks of packed ints
Date Fri, 21 Dec 2012 15:21:12 GMT
Adrien Grand created LUCENE-4643:
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             Summary: PackedInts: convenience classes to write blocks of packed ints
                 Key: LUCENE-4643
                 URL: https://issues.apache.org/jira/browse/LUCENE-4643
             Project: Lucene - Core
          Issue Type: Bug
            Reporter: Adrien Grand
            Assignee: Adrien Grand
            Priority: Minor


It is often useful to divide a packed stream into fixed blocks which are all compressed independently:
 * if your sequence of ints is very large, you won't have to buffer everything into memory
to compute the required number of bits per value,
 * the compression ratio will be better in case of rare extreme values.

The only drawback compared to the original PackedInts API is that the stream cannot be directly
used to deserialize a random-access PackedInts.Reader (but for sequential access, this is
just fine).

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