[GitHub] [pinot] deemoliu commented on issue #4248: Alternative HyperLogLog implementation with higher accuracy

["deemoliu (via GitHub)" <gi...@apache.org>]

deemoliu commented on issue #4248:
URL: https://github.com/apache/pinot/issues/4248#issuecomment-1613766131

   Hi @Jackie-Jiang 
   
   currently pinot is using https://github.com/addthis/stream-lib/blob/master/src/main/java/com/clearspring/analytics/stream/cardinality/HyperLogLog.java
   
   we have some customers observed that HLL++ has higher accuracy than HLL when cardinality of dimension is at 10k-100k.
   
   is there a plan to support hll++ in Pinot distinctHLLL (or other functions)? https://github.com/addthis/stream-lib/blob/master/src/main/java/com/clearspring/analytics/stream/cardinality/HyperLogLogPlus.java


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