| From: | Jeff Davis <jdavis(at)postgresql(dot)org> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: Use pg_bitutils for HyperLogLog. |
| Date: | 2020-07-30 16:16:09 |
| Message-ID: | E1k1BE1-0004QI-Ci@gemulon.postgresql.org |
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| Lists: | pgsql-committers |
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-WzkGvDKVDo+0YvfvZ+1CE=iCi88DCOGFF3i1hTGGaxcKPw@mail.gmail.com
Backpatch-through: 13
Branch
------
master
Details
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https://git.postgresql.org/pg/commitdiff/fd734f387d8780d9989d750942d026167de8cf3c
Modified Files
--------------
src/backend/lib/hyperloglog.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
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