------- Comment #14 from jv244 at cam dot ac dot uk 2009-08-15 18:46 ------- (In reply to comment #13) > > -flto needs about 35min compile time and 10.5Gb RAM. > > Doh. How does that compare to the all-CP2K in one file builds?
an all-in-one-file-CP2K takes about 2.5Gb and 30min last time I tested. So it is mostly the memory increase that is really significant. BTW, -fwhole-program seems to make the build more expensive. The following (with consistently compiled objects) requires now 67min: gfortran -flto -fwhole-file -fwhole-program -O3 -ffast-math -funroll-loops -march=native -ffree-form *.o [..] -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41069
