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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-2068) Search Grouping: collapse by string specialization
Date Tue, 23 Nov 2010 20:36:19 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2068?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12935032#action_12935032
] 

Yonik Seeley commented on SOLR-2068:
------------------------------------

I just enabled and committed the code to collapse by string more efficiently (after adding
support for null values).

Here are the results of some quick tests.
index: docs=10M, segments=11
query=\*:\*
rows=10

|number of unique values in field.group|ms before patch|ms after patch|
|10|816|306|
|100|630|388|
|1000|612|367|
|10000|681|368|
|100000|995|436|

> Search Grouping: collapse by string specialization
> --------------------------------------------------
>
>                 Key: SOLR-2068
>                 URL: https://issues.apache.org/jira/browse/SOLR-2068
>             Project: Solr
>          Issue Type: Sub-task
>            Reporter: Yonik Seeley
>         Attachments: SOLR-2068.patch, SOLR-2068.patch, SOLR-2068.patch
>
>
> Create specialized implementations for collapsing by an indexed string field.

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