On Thu, Feb 25, 2016 at 12:26 PM, Bruce Momjian <br...@momjian.us> wrote: > On Thu, Feb 25, 2016 at 10:06:34AM +1100, James Sewell wrote: >> Now when I run the following SQL (multiple times to allow for getting >> everything into shared buffers, which is 4GB on my machine): >> >> >> select sum(count_n) from base group by view_time_day; >> >> >> I get the following results: >> >> >> PSQL 9.5 - ~21 seconds >> PSQL 9.6 devel - ~8.5 seconds >> >> >> I think that's pretty good! >> >> I know this is a devel release, things may change, blah blah. But still, >> something has changed for the better here! > > Wow, that is cool. Can anyone suggest which commit improved this?
Since it sums numerics, maybe integer transition functions from commit 959277a4f579da5243968c750069570a58e92b38 helped? -- Thomas Munro http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
