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class DomainObj(object): | |
def __init__(self): | |
self._owner = None | |
class Domain(object): | |
def request_exec_on_with(self, method_name, target, *args): | |
fun = getattr(target, method_name) | |
return fun(*args) | |
class AddDomain(object): | |
def request_exec_on_with(self, method_name, target, *args): | |
fun = getattr(target, method_name) | |
return 1 + fun(*args) | |
class _IntercessionProxy(object): | |
def __init__(self, target, method_name): | |
self._target = target | |
self._method_name = method_name | |
def __call__(self, *args): | |
return self._target._owner.request_exec_on_with(self._method_name, self._target, *args) | |
class DomainRef(object): | |
def __init__(self, obj, domain): | |
obj._owner = domain | |
self._target = obj | |
# self._cache = { | |
# 'get' : _IntercessionProxy(self._target, 'get'), | |
# 'inc' : _IntercessionProxy(self._target, 'inc') | |
# } | |
def __getattr__(self, method_name): | |
return _IntercessionProxy(self._target, method_name) | |
class Adder(DomainObj): | |
def __init__(self): | |
self._value = 0 | |
def get(self): | |
return self._value | |
def inc(self): | |
self._value += 1 | |
return self._value | |
a = Adder() | |
print a.get() | |
a.inc() | |
print a.get() | |
b = DomainRef(Adder(), Domain()) | |
print b.get() | |
b.inc() | |
print b.get() | |
b = DomainRef(Adder(), AddDomain()) | |
print b.get() | |
b.inc() | |
print b.get() | |
def benchmark_direct(inner_iter): | |
add = Adder() | |
result = 0 | |
for i in range(0, inner_iter): | |
result = 1 + add.inc() | |
return result | |
def benchmark_proxy(inner_iter): | |
add = DomainRef(Adder(), AddDomain()) | |
result = 0 | |
for i in range(0, inner_iter): | |
result = add.inc() | |
return result | |
import time | |
def microseconds(): | |
return time.time() * 1000 * 1000 | |
inner_iter = 50000000 | |
for i in range(0, 100): | |
start_d = microseconds() | |
d = benchmark_direct(inner_iter) | |
elapsed_d = microseconds() - start_d | |
print "Direct: iterations=1 runtime: %dus" % elapsed_d | |
start_p = microseconds() | |
p = benchmark_proxy(inner_iter) | |
elapsed_p = microseconds() - start_p | |
print "Proxy: iterations=1 runtime: %dus" % elapsed_p | |
start_p = microseconds() | |
p = benchmark_proxy(inner_iter) | |
elapsed_p = microseconds() - start_p | |
print "Proxy: iterations=1 runtime: %dus" % elapsed_p | |
if d != p: | |
print "results are incorrect, direct: %d proxy: %d " % (d, p) | |
import os | |
os.exit(1) | |
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