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Posted to dev@lucene.apache.org by "Michael McCandless (JIRA)" <ji...@apache.org> on 2009/12/10 12:12:18 UTC

[jira] Created: (LUCENE-2141) Make String and StringIndex in field cache more RAM efficient

Make String and StringIndex in field cache more RAM efficient
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                 Key: LUCENE-2141
                 URL: https://issues.apache.org/jira/browse/LUCENE-2141
             Project: Lucene - Java
          Issue Type: Improvement
          Components: Search
            Reporter: Michael McCandless
             Fix For: 3.1


Once flex has landed and LUCENE-1990 is done, we should improve the RAM efficiency of String and StringIndex.

The text data can be stored in native UTF8 (saves decode when loading), and as byte[] blocks (saves GC load and high RAM overhead of individual strings).

And with packed unsigned ints we can save alot for cases that don't have that many unique string values.

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