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https://issues.apache.org/jira/browse/LUCENE-7474?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15564060#comment-15564060
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Otis Gospodnetic commented on LUCENE-7474:
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I was wondering how one could compare Lucene indexing (and searching)
performance before and after this change. Is there a way to add a sparse
dataset for the nightly benchmark and use it for both trunk and 6.x branch, so
one can see the performance difference of Lucene 6.x with sparse data vs.
Lucene 7.x with sparse data?
> Improve doc values writers
> --------------------------
>
> Key: LUCENE-7474
> URL: https://issues.apache.org/jira/browse/LUCENE-7474
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Fix For: master (7.0)
>
> Attachments: LUCENE-7474.patch
>
>
> One of the goals of the new iterator-based API is to better handle sparse
> data. However, the current doc values writers still use a dense
> representation, and some of them perform naive linear scans in the nextDoc
> implementation.
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