[jira] [Created] (LUCENE-5046) Explore preset dictionaries for CompressingStoredFieldsFormat

["Adrien Grand (JIRA)" <ji...@apache.org>]

Adrien Grand created LUCENE-5046:
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             Summary: Explore preset dictionaries for CompressingStoredFieldsFormat
                 Key: LUCENE-5046
                 URL: https://issues.apache.org/jira/browse/LUCENE-5046
             Project: Lucene - Core
          Issue Type: Improvement
            Reporter: Adrien Grand
            Assignee: Adrien Grand
            Priority: Trivial


I discussed this possible improvement with Stefan Pohl and Andrzej Białecki at Berlin Buzzwords: By having preset dictionaries (which could be user-provided and/or computed on a per-block basis), decompression could be faster since we would never have to decompress several documents from a block in order to access a single document.

One drawback is that it would require putting some boundaries in the compressed stream, so it would maybe decrease a little the compression ratio. But then if decompression is faster, we could also afford larger blocks, so I think this is worth exploring.




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