Question

import cy_fib
import bitey_fib

print ctypes_fib(100)
print bitey_fib.c_fib(100)
print cy_fib.cython_fib(100)

3.54224848179e+20
3.54224848179e+20
3.54224848179e+20

%timeit -n 1000 ctypes_fib(100)
%timeit -n 1000 bitey_fib.c_fib(100)
%timeit -n 1000 cy_fib.cython_fib(100)

1000 loops, best of 3: 92.3 µs per loop
1000 loops, best of 3: 905 ns per loop
1000 loops, best of 3: 264 ns per loop