Use pg_bitutils for HyperLogLog.
Using pg_leftmost_one_post32() yields substantial performance benefits.
Backpatching to version 13 because HLL is used for HashAgg
improvements in 9878b643, which was also backpatched to 13.
Reviewed-by: Peter Geoghegan
Discussion:
https://postgr.es/m/CAH2-WzkGv
Use pg_bitutils for HyperLogLog.
Using pg_leftmost_one_post32() yields substantial performance benefits.
Backpatching to version 13 because HLL is used for HashAgg
improvements in 9878b643, which was also backpatched to 13.
Reviewed-by: Peter Geoghegan
Discussion:
https://postgr.es/m/CAH2-WzkGv
