Fine tuning Fibonacci example

cython/c-functions/solution/fib.pyx

@@ -3,12 +3,7 @@ cpdef int fibonacci(int n):
         return n
     return fibonacci(n-2) + fibonacci(n-1)
 
-def fibonacci_py(int n):
+def fibonacci_py(n):
     if n < 2:
         return n
     return fibonacci_py(n-2) + fibonacci_py(n-1)
-
-def fibonacci_py2(n):
-    if n < 2:
-        return n
-    return fibonacci_py2(n-2) + fibonacci_py2(n-1)

cython/c-functions/solution/fib_py.py

@@ -0,0 +1,4 @@
+def fibonacci(n):
+    if n < 2:
+        return n
+    return fibonacci(n-2) + fibonacci(n-1)

cython/c-functions/solution/test_fib.py

@@ -0,0 +1,19 @@
+from fib import fibonacci
+from fib_py import fibonacci as fibonacci_py
+from timeit import repeat
+
+ncython = 100
+npython = 10
+
+# Pure Python
+time_python = repeat("fibonacci_py(30)", number=npython, globals=locals())
+time_python = min(time_python) / npython
+
+# Cython
+time_cython = repeat("fibonacci(30)", number=ncython, globals=locals())
+time_cython = min(time_cython) / ncython
+
+print("Pure Python: {:5.4f} s".format(time_python))
+print("Cython:      {:5.4f} s".format(time_cython))
+print("Speedup:    {:5.1f}".format(time_python / time_cython))
+