On Thu, Apr 07, 2022 at 03:14:01PM +0800, Julien Rouhaud wrote:
> Sure, but gettimeofday() has been implemented in vDSO for quite some time on
> most platforms, so it shouldn't hurt that much on mainstream platforms
> especially compared to the cost of whatever operation is actually using that
> temporary file.
>
> I don't think that having an extra GUC for temp IO is sensible, if that's why
> you're suggesting? Or are you just asking to do some benchmarking on some
> platform where getting the time is known to be slow (Windows?).
I am asking about the latter, but the former could be one solution if
the latter proves to be a problem, and this has not been discussed on
the thread yet. So, with some kind of worst-case scenario, how much
worse the performance gets once you add those extra calls when
compared to HEAD? I think that we'd better be careful with any
additions of INSTR_TIME_SET_CURRENT().
--
Michael
