leerho edited a comment on issue #6795: Different groupBy strategies for ThetaSketch and HyperUnique? URL: https://github.com/apache/incubator-druid/issues/6795#issuecomment-451322966 @csimplestring > But the performance is still a small hurdle to me. I'd be curious if you tried the HLL sketch in the DataSketches library if you have the same problem. This would just be a test. The DS HLL sketch (like the Druid HLL sketch) is not suitable for intersections or set differences :)
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