Robert Haas <robertmh...@gmail.com> writes: > On Mon, May 29, 2017 at 3:45 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: >> I wonder what the overhead is of using -fPIC when -fpic would be >> sufficient.
> Do we have an idea how to measure the increased overhead? Just from > reading the description, I'm guessing that the increased cost would > happen when the extension calls back into core, but maybe that doesn't > happen often enough to worry about? My gut feeling is that it'd be a pretty distributed cost, because every internal cross-reference in the .so (for instance, loading the address of a string literal) would involve a bit more overhead to support a wider offset field. An easy thing to look at would be how much the code expands by. That might or might not be a good proxy for the runtime slowdown percentage, but it seems like it ought to serve as a zero-order approximation. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers