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https://issues.apache.org/jira/browse/LUCENE-5634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13987827#comment-13987827
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Michael McCandless commented on LUCENE-5634:
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BTW, that test was with precStep=8. If I use precStep=4 (still the default, we
really have to fix LUCENE-5609!) then indexing time for Geonames with the patch
is 164.8 sec (63% slower!).
> Reuse TokenStream instances in Field
> ------------------------------------
>
> Key: LUCENE-5634
> URL: https://issues.apache.org/jira/browse/LUCENE-5634
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Michael McCandless
> Fix For: 4.9, 5.0
>
> Attachments: LUCENE-5634.patch, LUCENE-5634.patch, LUCENE-5634.patch
>
>
> If you don't reuse your Doc/Field instances (which is very expert: I
> suspect few apps do) then there's a lot of garbage created to index each
> StringField because we make a new StringTokenStream or
> NumericTokenStream (and their Attributes).
> We should be able to re-use these instances via a static
> ThreadLocal...
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