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https://issues.apache.org/jira/browse/LUCENE-2128?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Israel Tsadok updated LUCENE-2128:
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    Attachment: LUCENE-2128.patch

Attaching a patch that actually compiles.

> Further parallelizaton of ParallelMultiSearcher
> -----------------------------------------------
>
>                 Key: LUCENE-2128
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2128
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>    Affects Versions: 3.0
>            Reporter: Israel Tsadok
>            Priority: Minor
>         Attachments: LUCENE-2128.patch, LUCENE-2128.patch
>
>
> When calling {{search(Query, Filter, int)}} on a ParallelMultiSearcher, the 
> {{createWeights}} function of MultiSearcher is called, and sequentially calls 
> {{docFreqs()}} on every sub-searcher. This can take a significant amount of 
> time when there are lots of remote sub-searchers.

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