Add march=native

CMakeLists.txt

@@ -79,7 +79,9 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_CXX_COMPILER_ID MATCHES "GNU")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} \
         -Wall \
         -Wextra \
+        -march=native \
         -Werror \
+        -pipe \
         -pedantic \
         -Wunreachable-code")