[jira] [Commented] (LUCENE-4764) Faster but more RAM/Disk consuming DocValuesFormat for facets

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

    [ https://issues.apache.org/jira/browse/LUCENE-4764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13575162#comment-13575162 ] 

Robert Muir commented on LUCENE-4764:
-------------------------------------

should it really write a byte[]? i wonder how it would perform if it wrote and kept in ram packed ints, since it knows whats in the byte[]. 

it would just make a byte[] on the fly to satisfy merging etc but otherwise provide an int-based interface for facets?

                
> Faster but more RAM/Disk consuming DocValuesFormat for facets
> -------------------------------------------------------------
>
>                 Key: LUCENE-4764
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4764
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 4.2, 5.0
>
>         Attachments: LUCENE-4764.patch
>
>
> The new default DV format for binary fields has much more
> RAM-efficient encoding of the address for each document ... but it's
> also a bit slower at decode time, which affects facets because we
> decode for every collected docID.

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