Hannah_Bast added a comment.
I have already talked about Sage with Lukas last November. I don't think that Sage is an option for Wikidata. The focus of Sage is on the ability to pause and resume SPARQL queries (which is a very useful feature), not on efficiency. For example, if you run the people-professions query from https://phabricator.wikimedia.org/T206560 on their demo instance of Wikidata http://sage.univ-nantes.fr/#query (which has only 2.3B triples), it takes forever. Also simple queries are quite slow. For example, the following query (all humans) produces results at a rate of around a thousand rows per second: PREFIX wd: <http://www.wikidata.org/entity/> PREFIX wdt: <http://www.wikidata.org/prop/direct/> SELECT ?person WHERE { ?person wdt:P31 wd:Q5 . } My understanding is that they have not implemented their own SPARQL engine, but that they use a vanilla database engine in the background. On https://github.com/sage-org/sage-engine they mention SQLite and PostgreSQL TASK DETAIL https://phabricator.wikimedia.org/T290839 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Hannah_Bast Cc: Justin0x2004, Lucas_Werkmeister_WMDE, Bugreporter, Hannah_Bast, Aklapper, MPhamWMF, So9q, Invadibot, maantietaja, CBogen, Akuckartz, Nandana, Namenlos314, Lahi, Gq86, GoranSMilovanovic, QZanden, EBjune, merbst, LawExplorer, _jensen, rosalieper, Scott_WUaS, Jonas, Xmlizer, jkroll, Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331
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