Re: BUG #16223: Performance regression between 11.6 and 12.1 in an SQL query with a recursive CTE based on function

Christian Schwaderer <schwaderer@ivocotec.de> writes:
> On 27.01.20 16:31, Tom Lane wrote:
>> Another thing that could be relevant is JIT, which is on by default
>> in v12 (if enabled in configuration), and which is still suffering
>> a lot of teething pains performance-wise.  I'd check if that's
>> on and try disabling it if so.

> Anyway: Here are the details of versions and pg_config

I see JIT support (--with-llvm) in those configurations, so
did you heed the above advice?

            regards, tom lane