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PYTHON setup.py build_ext --inplace
PYTHON test_profile.py
######## setup.py ###########
from distutils.extension import Extension
from distutils.core import setup
from Cython.Build import cythonize
extensions = [
Extension("collatz", ["collatz.pyx"], define_macros=[('CYTHON_TRACE', '1')])
]
setup(
ext_modules = cythonize(extensions)
)
######## test_profile.py ###########
try:
import line_profiler
except ImportError:
print("No line profiler, skipping test.")
import sys
sys.exit(0)
def assert_stats(profile, name):
profile.print_stats()
stats = profile.get_stats()
assert len(stats.timings) > 0, "No profile stats."
for key, timings in stats.timings.items():
if key[-1] == name:
assert len(timings) > 0
break
else:
raise ValueError("No stats for %s." % name)
from collatz import collatz
func = collatz
profile = line_profiler.LineProfiler(func)
profile.runcall(func, 19)
assert_stats(profile, func.__name__)
from collatz import cp_collatz
func = cp_collatz
profile = line_profiler.LineProfiler(func)
profile.runcall(func, 19)
assert_stats(profile, func.__name__)
from collatz import run_generator, cy_generator
func = cy_generator
profile = line_profiler.LineProfiler(func)
profile.runcall(run_generator, 19)
assert_stats(profile, func.__name__)
from collatz import run_coro, cy_coro
func = cy_coro
profile = line_profiler.LineProfiler(func)
profile.runcall(run_coro, 19)
assert_stats(profile, func.__name__)
from collatz import PyClass
obj = PyClass()
func = obj.py_pymethod
profile = line_profiler.LineProfiler(func)
profile.runcall(func)
assert_stats(profile, func.__name__)
from collatz import CClass
obj = CClass()
func = obj.c_pymethod
profile = line_profiler.LineProfiler(func)
profile.runcall(func)
assert_stats(profile, func.__name__)
func = obj.cp_pymethod
profile = line_profiler.LineProfiler(func)
profile.runcall(func, 19)
assert_stats(profile, func.__name__)
######## collatz.pyx ###########
# cython: linetrace=True
cimport cython
@cython.binding(True)
def collatz(n):
while n > 1:
if n % 2 == 0:
n //= 2
else:
n = 3*n+1
@cython.binding(True)
cpdef cp_collatz(n):
while n > 1:
if n % 2 == 0:
n //= 2
else:
n = 3*n+1
@cython.binding(True)
def cy_generator(int n):
x = 1
for i in range(n):
yield x + 2
# waste some time to avoid 0 runtimes (line profiler cannot handle those)
while <object>(i + x) < n + 10:
i += 2
@cython.binding(True)
def run_generator(n):
assert len(list(cy_generator(n))) == n
@cython.binding(True)
async def cy_coro(int n):
while n > 1:
if n % 2 == 0:
n //= 2
else:
n = 3*n+1
x = <object> n # make sure the computation does not get discarded
@cython.binding(True)
def run_coro(n):
coro = cy_coro(n)
try:
coro.send(None)
except StopIteration:
assert True
else:
assert False, "Coroutine did not raise"
@cython.binding(True)
class PyClass(object):
def py_pymethod(self):
x = 1
for i in range(10):
a = x + 2
return a * 3
@cython.binding(True)
cdef class CClass:
def c_pymethod(self, c=2):
for i in range(10):
a = c + 1
y = self.cmethod(c + a)
return y * 4
cpdef cp_pymethod(self, r):
for i in range(10):
a = r + 1
z = self.c_pymethod(a) + self.cmethod(r)
return z * 2
cdef cmethod(self, s):
for i in range(10):
p = s + 3
return p * 5
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