Testing how slow or fast is fetch attributes and call external functions

test_python.py

from timeit import timeit

class Object:
    def __init__(self, x):
        self.x = x

class Rule:
    def __init__(self, valid_values, valid_values2):
        self.valid_values = valid_values
        self.valid_values2 = valid_values2

rules = [Rule([x], [x]) for x in range(1000)]
objects = [Object(x) for x in range(1000)]

def cache():
    cnt = 0
    for rule in rules:
        valid_values = rule.valid_values
        valid_values2 = rule.valid_values2
        for object in objects:
            if not object.x in valid_values:
                continue
            if not object.x in valid_values2:
                continue
            cnt += object.x

def fetch():
    cnt = 0
    for rule in rules:
        for object in objects:
            if not object.x in rule.valid_values:
                continue
            if not object.x in rule.valid_values2:
                continue
            cnt += object.x

def fetch_and_call():
    cnt = 0
    for rule in rules:
        for object in objects:
            if filter(object, rule):
                cnt += object.x

def filter(object, rule):
    if not object.x in rule.valid_values:
        return False
    if not object.x in rule.valid_values2:
        return False

    return True


def run_test():
    print("Cache local attributes {}".format(timeit("cache()", 'from __main__ import cache', number=10)))
    print("None cache local attributes {}".format(timeit("fetch()", 'from __main__ import fetch', number=10)))
    print("Call an external function {} ".format(timeit("fetch_and_call()", 'from __main__ import fetch_and_call', number=10)))

run_test()

Interpreter	Cached	None Cached	Call external function
Python2.7-10	0.649	1.005	2.076
Python3.5	0.677	1.138	2.169
Python3.6	0.713	1.161	2.285
pypy	0.094	0.102	0.103