Lets switch to full -Ofast [read more]

It is better to take full advantage of -Ofast instead of sticking with -O3. -Ofast disregards strict standards compliance. -Ofast enables all -O3 optimizations. It also enables optimizations that are not valid for all standard-compliant programs. It turns on -ffast-math and the Fortran-specific -fno-protect-parens and -fstack-arrays.

Signed-off-by: Lens-F <tnoah12@gmail.com>