In [1]:

    

import setuptools
%load_ext cython


    

In [2]:

    

import numpy as np


    

In [3]:

    

%%cython
def cythonfib(int n):
    cdef int a,b,i
    a, b = 0, 1
    for i in range(n):
        a, b = a+b , a
    return a


    

In [4]:

    

def pythonfib(n):
    a, b = 0, 1
    for i in range(n):
        a, b = a+b , a
    return a


    

In [5]:

    

%timeit cythonfib (4)


    

    




The slowest run took 20.29 times longer than the fastest. This could mean that an intermediate result is being cached 
10000000 loops, best of 3: 52.2 ns per loop

In [6]:

    

%timeit pythonfib (4)


    

    




1000000 loops, best of 3: 646 ns per loop

In [24]:

    

%%cython
from libc.math cimport sin
def sinefunc(float b):
    cdef float a
    a = sin(b)
    return a


    

In [27]:

    

import numpy as np
a = sinefunc(np.pi)
a


    

    
Out[27]:





-8.742277657347586e-08