Hello,
I decided to compare v17 vs v16 performance (as I did the last year [1])
and discovered that v17 loses to v16 in the pg_tpcds (s64da_tpcds)
benchmark, query15 (and several others, but I focused on this one):
Best pg-src-master--.* worse than pg-src-16--.* by 52.2 percents (229.84 > 151.03): pg_tpcds.query15
Average pg-src-master--.* worse than pg-src-16--.* by 53.4 percents (234.20 > 152.64): pg_tpcds.query15
Please look at the full html report attached in case you're interested.
(I used my pg-mark tool to measure/analyze performance, but I believe the
same results can be seen without it.)
`git bisect` for this performance degradation pointed at b7b0f3f27...
[1] https://www.postgresql.org/message-id/b32bed1b-0746-9b20-1472-4bdc9ca66d52%40gmail.com
Best regards,
Alexander