diff --git a/run.sh b/run.sh
index ec03eaf8d28238cc7dc1f79bc8683a9df35ac69d..d24482a944778f92eda99640991c249605b8efc2 100644
--- a/run.sh
+++ b/run.sh
@@ -1,2 +1,2 @@
 mkdir -p results restart output
-mpiexec -np 1 src/pafiX
+mpiexec -np 2 src/pafiX
diff --git a/src/makefile b/src/makefile
index 765e26bf200ea63a9884cce9de3d9b240e373dbc..148b3517f839d4e5cd94eb90762e19682db5a652 100644
--- a/src/makefile
+++ b/src/makefile
@@ -15,9 +15,9 @@ INC =
 # gcc:
 CMP = mpifort
 #O3: optimization
-#FLAGS   = -O3 -mcmodel=medium -pg
+FLAGS   = -O3 -mcmodel=medium -pg
 #debugging:
-FLAGS   = -g3 -O0 -fbounds-check -mcmodel=medium -fimplicit-none -fcheck=all -fbacktrace -floop-nest-optimize -ffpe-trap=invalid,zero,overflow -Wconversion -fno-tree-vectorize
+#FLAGS   = -g3 -O0 -fbounds-check -mcmodel=medium -fimplicit-none -fcheck=all -fbacktrace -floop-nest-optimize -ffpe-trap=invalid,zero,overflow -Wconversion -fno-tree-vectorize
 FFLAGS  = -c $(FLAGS)