I'm doing aggs.terms (StringTermsAggregator) on 300 fields, which takes 60~100ms (there are 300 docs after query/filter).
If using lucene org.apache.lucene.facet.FacetsCollector, it takes 10ms.
Is there a way to use lucene FacetField in Elasticseach? If not, should we add such a field type?