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https://issues.apache.org/jira/browse/LUCENE-4317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uwe Schindler updated LUCENE-4317:
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Attachment: LUCENE-4317.patch
Patch:
- Streamlines handling of NumericTokenStreanm and a new internal
StringTokenStream. Previous code was not easy to read.
- Reuse of both (of course, not accross field instances). This improves the
performance of reused Field instances enormous, as creating a new TokenStream
for each small String is heavy (2 LinkedHashMaps, addition of attributes,...)
We should maybe think about a solution how to "cache" the instances across
several instances (like IndexWriter did in 3.x). I was thinking about a
singleton Analyzer...
For now this patch helps a lot.
> Field.java does not reuse its inlined Keyword-TokenStream
> ---------------------------------------------------------
>
> Key: LUCENE-4317
> URL: https://issues.apache.org/jira/browse/LUCENE-4317
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/index
> Affects Versions: 4.0-BETA
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Fix For: 5.0, 4.0
>
> Attachments: LUCENE-4317.patch
>
>
> Field.java contains a inlined Keyword-TokenStream. Unfortunately this one is
> recreated all the time, although one reuses the same Field instance. For
> NumericTokenStream Field.java reuses it, but the Keyword one not.
> We should apply the same logic and lazy init the TokenStream with a setter
> for the String value and reset(). This would be looking identical to
> SetNumeric(xx).
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