[jira] [Updated] (LUCENE-5882) add 4.10 docvaluesformat

["Robert Muir (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-5882?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir updated LUCENE-5882:
--------------------------------

    Attachment: LUCENE-5882.patch

Patch. 

Also when cardinality is low (there would be no reverse index), compression saves very little RAM, so just encode as variable binary for a little extra speed since its going to be under 8KB ram for addressing anyway.

> add 4.10 docvaluesformat
> ------------------------
>
>                 Key: LUCENE-5882
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5882
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Robert Muir
>         Attachments: LUCENE-5882.patch
>
>
> We can improve the current format in a few ways:
> * speed up Sorted/SortedSet byte[] lookup by structuring the term blocks differently (allow random access, more efficient bulk i/o)
> * speed up reverse lookup by adding a reverse index (small: just every 1024'th term with useless suffixes removed).
> * use slice API for access to access to binary content, too.



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