brealisty opened a new issue, #1852:
URL: https://github.com/apache/jena/issues/1852
### Version
fuseki2 4.4.0
### Question
- the rdf ontology like this: three entities A B C, A-relation1-B,
A-relation2-C, B-relation3-C.
- when count the thriples with: `select (count(?s) as ?count) {?s ?p ?o}`,
very very slow, about 120s, but just only 90k triples
- the memory 6G, out of memory; then set 12G, almost full.
but when I delete A-relation1-B, will be very fast, less than 3s, 60k
triples; 6G memory work well.
I've tried another graph, about 120k triples, also less than 3s.
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