Nikhil Sontakke wrote:
I was wondering why -Os is not used in place of -O2 while compiling the Postgres sources with gcc. I prepared 2 install directories by respectively using -Os and -O2 flags and in the former case it seems to reduce the install footprint by about 1MB or so. Agreed this is not significant for normal systems. But I was wondering if there is a performance reason too for not using -Os.
-Os disables optimizations that make the code run faster, like loop unrolling. There's no free lunch.
-- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
