title: Which compiler options to use with gfortran?
body: <p>I am using Fortran 90 with the gfortran compiler. It's my first experience with a compiled language. Why not just use all of the compiler options when compiling? Would it slow down running the executable? Which compiler options do you recommend? Also, how does gfortran compare to other compilers for Fortran 90? What is important to know about it?</p>