On Fri, Mar 2, 2012 at 8:45 PM, Robert Haas <robertmh...@gmail.com> wrote: > 12789 28.2686 libc-2.13.so strcoll_l > 6802 15.0350 postgres text_cmp
I'm still curious how it would compare to call strxfrm and sort the resulting binary blobs. I don't think the sortsupport stuff actually makes this any easier though. Since using it requires storing the binary blob somewhere I think the support would have to be baked into tuplesort (or hacked into the sortkey as an expr that was evaluated earlier somehow). It's a tradeoff and not an obvious one. The binary blobs are larger and it would mean reading and copying more data around memory. But it would mean doing the work that strcoll_l does only n times instead of nlogn times. That might be a pretty significant gain. -- greg -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
