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https://issues.apache.org/jira/browse/SOLR-9176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15308122#comment-15308122
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ASF GitHub Bot commented on SOLR-9176:
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Github user alessandrobenedetti commented on the pull request:
https://github.com/apache/lucene-solr/commit/1489085807cb10981a7ea5b5663ada4e3f85953e#commitcomment-17682489
In solr/core/src/java/org/apache/solr/request/SimpleFacets.java:
In solr/core/src/java/org/apache/solr/request/SimpleFacets.java on line 392:
https://issues.apache.org/jira/browse/SOLR-9176
> Legacy Faceting Term Enum Method Regression
> -------------------------------------------
>
> Key: SOLR-9176
> URL: https://issues.apache.org/jira/browse/SOLR-9176
> Project: Solr
> Issue Type: Bug
> Components: faceting
> Affects Versions: 5.2, 5.2.1, 5.3, 5.3.1, 5.3.2, 5.4, 5.4.1, 5.5, 5.5.1,
> 6.0, 6.0.1
> Reporter: Alessandro Benedetti
>
> Starting from this commit :
> LUCENE-5666: get solr started
> git-svn-id:
> https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5666@1594254
> 13f79535-47bb-0310-9956-ffa450edef68
> https://github.com/apache/lucene-solr/commit/1489085807cb10981a7ea5b5663ada4e3f85953e#diff-5ac9dc7b128b4dd99b764060759222b2
> It is not possible to use Term Enum as a faceting method, for numeric and
> single valued fields ( org.apache.solr.request.SimpleFacets ) .
> We personally verified that there are use cases when this is bringing a quite
> big performance regression ( even with DocValues enabled) .
> In the mailing list from time to time people complain about a regression
> happening with the term enum method, but actually it is more likely to be the
> automatic forcing of FCS.
> Forcing FCS in co-op with the famous regression that happened in SOLR-8096
> could be confused as a term Enum regression.
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