Oskari Saarenmaa <o...@ohmu.fi> writes: > 17.08.2016, 22:11, Tom Lane kirjoitti: >> I'd be more excited about this if the claimed improvement were more than >> 1.5%, but you know as well as I do that that's barely above the noise >> floor for most performance measurements. I'm left wondering why bother, >> and why take any risk of de-optimizing on some platforms.
> I think it makes sense to try to optimize for the platforms that people > actually use for performance critical workloads, especially if it also > allows us to simplify the code and remove more lines than we add. It's > nice if the software still works on legacy platforms, but I don't think > we should be concerned about a hypothetical performance impact on > platforms no one uses in production anymore. Well, my point remains that I see little value in messing with long-established code if you can't demonstrate a benefit that's clearly above the noise level. We don't really know whether this change might have adverse impacts somewhere --- either performance-wise or bug-wise --- and for that amount of benefit I don't want to take the trouble to find out. regards, tom lane -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers