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https://issues.apache.org/jira/browse/LUCENE-7396?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15398278#comment-15398278
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Michael McCandless commented on LUCENE-7396:
--------------------------------------------

I made a separate speedup in luceneserver to bring indexing rate to 232.7 K 
docs/sec, and then with this patch it gets even faster to 261.4 K docs/sec, 
net/net ~27% speedup!

> Speed up flush of 1-dimension points
> ------------------------------------
>
>                 Key: LUCENE-7396
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7396
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Priority: Minor
>         Attachments: LUCENE-7396.patch, LUCENE-7396.patch, LUCENE-7396.patch, 
> LUCENE-7396.patch
>
>
> 1D points already have an optimized merge implementation which works when 
> points come in order. So maybe we could make IndexWriter's PointValuesWriter 
> sort before feeding the PointsFormat and somehow propagate the information to 
> the PointsFormat?
> The benefit is that flushing could directly stream points to disk with little 
> memory usage.



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