SOLR currently does not support caching for (Query, FacetFieldList)
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Key: SOLR-669
URL: https://issues.apache.org/jira/browse/SOLR-669
Project: Solr
Issue Type: Improvement
Affects Versions: 1.3
Reporter: Fuad Efendi
It is huge performance bottleneck and it describes huge difference between
qtime and SolrJ's elapsedTime. I quickly browsed SolrIndexSearcher: it caches
only (Key, DocSet/DocList <Lucene Ids>) key-value pairs and it does not have
cache for (Query, FacetFieldList).
filterCache stores DocList for each 'filter' and is used for constant
recalculations...
This would be significant performance improvement.
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