Justin Pryzby <pryzby@telsasoft.com> writes:
> I can reproduce the issue with generated data:
> pryzbyj=# SELECT format('create table t%s(i int)', i) FROM generate_series(1,9999)i;
Hm, I tried this case and didn't really detect much runtime difference
between v12 and HEAD.
> I don't know if it's any issue, but I found that pg12 can process "null
> statements" almost 2x as fast:
Now I'm suspicious that you're comparing an assert-enabled v13 build
to a non-assert-enabled v12 build. Check the output of
"pg_config --configure" from each installation to see if they're
configured alike.
regards, tom lane