added Fortran timings.

Author: alsam

README.md

@@ -124,3 +124,13 @@ Only the 2nd timing after warming up is given.
   7.177485 seconds (18 allocations: 3.053 MB)
   7.248687 seconds (18 allocations: 3.053 MB)
 ```
+
+    Fortran timing for `100000` number of cells
+```sh
+real    0m4.781s
+user    0m4.760s
+sys     0m0.000s
+
+```
+
+    That is 7.2s for Julia script vs. 4.8s for Fortran.

examples/scalar_law/PROGRAM1/fortran/GNUmakefile

@@ -3,8 +3,15 @@
 # to see the results after running, type
 #   xmgrace output
 FC=gfortran
+FCFLAGS=-O4
+FLFLAGS=-O4
+
+%.o: %.f
+	    $(FC) $(FCFLAGS) -c -o $@ $<
+
 flinearad : linaddmain.o consdiff.o linearad.o riemprob.o upwind.o
-	$(FC) -o $@ linaddmain.o consdiff.o linearad.o riemprob.o \
+	$(FC) $(FLFLAGS) -o $@ linaddmain.o consdiff.o linearad.o riemprob.o \
 	  upwind.o
+
 clean :
 	rm -f *.o flinearad

examples/scalar_law/PROGRAM1/fortran/linaddmain.f

@@ -24,7 +24,8 @@ program linaddmain
 c+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
       integer ncells
 !      parameter (ncells=100)
-      parameter (ncells=10000)
+!      parameter (ncells=10000)
+      parameter (ncells=100000)
 c+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
       include "linearad.i"
       include "const.i"