Nice, the only weird thing was the assumptions about OLAP (and I had to speed it up to ~1.4x). Like it uses strings (OLAP works way better over integral data,

Nice, the only weird thing was the assumptions about OLAP (and I had to speed it up to ~1.4x). Like it uses strings (OLAP works way better over integral data, it sucks at strings) or that it's easy to scale. It is easy-ish under fixed queries (classic MOLAP for example) but not over arbitrary queries and frequent updates, then it degenerates to a problem much worse than OLTP.