csimplestring commented on issue #6795: Different groupBy strategies for ThetaSketch and HyperUnique? URL: https://github.com/apache/incubator-druid/issues/6795#issuecomment-451265619 Hi, @gianm, I tried the 'v1' and 'v2' groupbyStrategy respectively, there is NO significant difference at all. I plan to switch to HyperUnique aggregator later in order to achieve faster speed. As mentioned in #6743, the Druid HLL implementation is some years ago and might be deprecated, using the theta sketch library is the preferred option. But the performance is still a small hurdle to me. But thanks for your help.
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