Re: gcc: why optimize for size flag is not the default

Heikki Linnakangas <heikki.linnakangas@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 ...
        regards, tom lane