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Posted to dev@lucene.apache.org by "Dawid Weiss (JIRA)" <ji...@apache.org> on 2015/07/06 10:44:05 UTC
[jira] [Reopened] (LUCENE-6365) Optimized iteration of finite
strings
[ https://issues.apache.org/jira/browse/LUCENE-6365?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dawid Weiss reopened LUCENE-6365:
---------------------------------
> Optimized iteration of finite strings
> -------------------------------------
>
> Key: LUCENE-6365
> URL: https://issues.apache.org/jira/browse/LUCENE-6365
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/other
> Affects Versions: 5.0
> Reporter: Markus Heiden
> Priority: Minor
> Labels: patch, performance
> Fix For: 5.3, Trunk
>
> Attachments: FiniteStrings_noreuse.patch, FiniteStrings_reuse.patch, LUCENE-6365.patch
>
>
> Replaced Operations.getFiniteStrings() by an optimized FiniteStringIterator.
> Benefits:
> Avoid huge hash set of finite strings.
> Avoid massive object/array creation during processing.
> "Downside":
> Iteration order changed, so when iterating with a limit, the result may differ slightly. Old: emit current node, if accept / recurse. New: recurse / emit current node, if accept.
> The old method Operations.getFiniteStrings() still exists, because it eases the tests. It is now implemented by use of the new FiniteStringIterator.
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