andrew@dunslane.net writes:
> Wouldn't he just need to rerun the tests with default_stats_target set to
> the old value? I presume he has actually done this already in order to
> come to the conclusion he did about the cause of the regression.
Yeah, he did, so we know it's slower that way. But exactly *why* it's
slower is not proven. It could be an artifact rather than something
we really ought to react to.
regards, tom lane