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from time import time
from math import sin
cdef double first_time = 0
def timeit(f, label):
global first_time
t = time()
f(1.0, 2.0, 10**7)
cdef double elapsed = time() - t
if first_time == 0:
first_time = elapsed
print label, elapsed, (100*elapsed/first_time), '% or', first_time/elapsed, 'x'
# Pure Python
py_funcs = {'sin': sin}
py_funcs.update(__builtins__.__dict__)
exec """
def f(x):
return x**2-x
def integrate_f(a, b, N):
s = 0
dx = (b-a)/N
for i in range(N):
s += f(a+i*dx)
return s * dx
""" in py_funcs
timeit(py_funcs['integrate_f'], "Python")
# Just compiled
def f0(x):
return x**2-x
def integrate_f0(a, b, N):
s = 0
dx = (b-a)/N
for i in range(N):
s += f0(a+i*dx)
return s * dx
timeit(integrate_f0, "Cython")
# Typed vars
def f1(double x):
return x**2-x
def integrate_f1(double a, double b, int N):
cdef int i
cdef double s, dx
s = 0
dx = (b-a)/N
for i in range(N):
s += f1(a+i*dx)
return s * dx
timeit(integrate_f1, "Typed vars")
# Typed func
cdef double f2(double x) except? -2:
return x**2-x
def integrate_f2(double a, double b, int N):
cdef int i
cdef double s, dx
s = 0
dx = (b-a)/N
for i in range(N):
s += f2(a+i*dx)
return s * dx
timeit(integrate_f2, "Typed func")
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