'-Ofast' and '-march=native' cause 2x-speedup in machines with SSE (but no AVX) instructions. Should help other platforms, too.

3 years ago · 49b2f9bd66
parent 603f97ba11
commit 49b2f9bd66
1 changed files with 2 additions and 2 deletions
--- a/4
+++ b/4
@ -27,8 +27,8 @@ endif
 # Compile flags
 #

-CFLAGS   = -I.              -O3 -std=c11   -fPIC
-CXXFLAGS = -I. -I./examples -O3 -std=c++11 -fPIC
+CFLAGS   = -I.              -O3 -std=c11   -fPIC -Ofast -march=native
+CXXFLAGS = -I. -I./examples -O3 -std=c++11 -fPIC -Ofast -march=native
 LDFLAGS  =

 # OS specific