Compare fibonacci calculation speed in Python and Cython

fib.py

try:
    from setuptools import setup
except ImportError:
    from distutils.core import setup

import pyximport; pyximport.install()
import fib

from time import time

def timems (itern, func, argtup):
    t = time()
    for i in range(itern):
        func(*argtup)
    ms = 1000 * (time() - t)
    return ms

FIBN = 90
ITERATIONS = 100000

def fibpy(n):
    a, b = 0.0, 1.0
    for i in range(n):
        a, b = a + b, a
    return a

pure_py_ms = timems (ITERATIONS, fibpy, (FIBN,))
print "\nPYTHON FIB(%d) = %0.0f" % (FIBN, pure_py_ms)

cython_ms = timems (ITERATIONS, fib.fibcy, (FIBN,))
print "\nCYTHON FIB(%d) = %0.0f ms" % (FIBN, cython_ms)

print "\nSPEEDUP = %0.0f\n" % (pure_py_ms / cython_ms)