Ranier Vilela <ranier(dot)vf(at)gmail(dot)com> writes:
> I retested this case with HEAD, and it seems to me that NLS does affect it.
Sure, there's no question that message translation will have *some* cost.
But on my machine it is an incremental tens-of-percent kind of cost,
and that is the result you're getting as well. So it's not very clear
where these factor-of-several-hundred differences are coming from.
regards, tom lane