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https://issues.apache.org/jira/browse/LUCENE-4792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13585474#comment-13585474
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Robert Muir commented on LUCENE-4792:
-------------------------------------
We are using the same compression for (as far as i know):
* stored fields, term vectors, docvalues "disk" addresses
* multidocvalues ordinal maps
We could consider trying it out for fieldcache and other places for example, im
not sure what the perf hit would be.
(I'm not very interested in optimizing fieldcache myself)
> Smaller doc maps
> ----------------
>
> Key: LUCENE-4792
> URL: https://issues.apache.org/jira/browse/LUCENE-4792
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Fix For: 4.2
>
> Attachments: LUCENE-4792.patch
>
>
> MergeState.DocMap could leverage MonotonicAppendingLongBuffer to save memory.
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