On 3/11/09, Tom Lane <t...@sss.pgh.pa.us> wrote: > Heikki Linnakangas <heikki.linnakan...@enterprisedb.com> writes: > > Nikhil Sontakke wrote: > >> I was wondering why -Os is not used in place of -O2 while compiling the > >> Postgres sources with gcc. > > > > There's no free lunch. > > > In any case, this sort of choice is generally something that ought to be > applied at a distro level. If, say, Fedora or Debian chose to use -Os > uniformly across all their packages, then there might be a meaningful > amount of space saved in the aggregate. As far as I know, though, -Os > is not the preferred choice in any distro, which ought to tell you > something ...
Linux kernel is moving to use -Os everywhere. AFAIK their argument is that kernel code should not be doing anything CPU-intensive, thus minimal cache usage is more important than unrolled loops. This also seems to hint that -Os is not really appropriate to Postgres. Although it would be good fit for eg. PgBouncer. -- marko -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
