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https://issues.apache.org/jira/browse/SOLR-15067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17332641#comment-17332641
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ASF subversion and git services commented on SOLR-15067:
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Commit 5425e55349b59d282ab1534a95f99e7d27913b40 in lucene-solr's branch
refs/heads/branch_8x from David Smiley
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=5425e55 ]
SOLR-15067: in 8x, perSegFilter has different values
> Child doc transformer should use the perSegFilter cache
> -------------------------------------------------------
>
> Key: SOLR-15067
> URL: https://issues.apache.org/jira/browse/SOLR-15067
> Project: Solr
> Issue Type: Improvement
> Reporter: David Smiley
> Priority: Major
> Labels: newdev
> Fix For: 8.9
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> The ChildDocTransformerFactory creates a QueryBitSetProducer every time.
> These are heavy to compute; they should be cached.
> BlockJoinParentQParserPlugin does this correctly, using the "perSegFilter"
> named Solr cache. They should both do the same. To avoid duplication of
> logic, consider creating a new class named something like
> PerSegFilterCacheManager, or maybe manage directly on SolrIndexSearcher
> (alas; SIS is huge).
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