[jira] [Commented] (LUCENE-7475) Sparse norms

["Michael McCandless (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-7475?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15549558#comment-15549558 ] 

Michael McCandless commented on LUCENE-7475:
--------------------------------------------

Woops, I just pushed a small speedup to the old norms format ({{Lucene43NormsProducer}}) to avoid the wrapper class (over dense norms) before seeing this new issue :)

> Sparse norms
> ------------
>
>                 Key: LUCENE-7475
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7475
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Priority: Minor
>             Fix For: master (7.0)
>
>         Attachments: LUCENE-7475.patch
>
>
> Even though norms now have an iterator API, they are still always dense in practice since documents that do not have a value get assigned 0 as a norm value.



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