High Memory Consumption on Barebone WAMP Component

Using memory_profile I verified that a empty barebone WAMP component has a high memory consumption. Bellow the examples for Twisted and Asyncio with Cpython3, and Pypy3

Twisted code:

from os import environ
from autobahn.twisted.wamp import ApplicationSession, ApplicationRunner

class MyComponent(ApplicationSession):

    def onJoin(self, details):
        print("joined")
        pass

if __name__ == '__main__':
    runner = ApplicationRunner(url=u"ws://localhost:8888/ws",
                               realm=u"RE_acct")

    runner.run(MyComponent, auto_reconnect=False)

Python3

~35Mb of RAM

PyPy3

~85Mb of RAM

Asyncio:

from os import environ
import asyncio
from autobahn.asyncio.wamp import ApplicationSession, ApplicationRunner

class MyComponent(ApplicationSession):    
    def onJoin(self, details):
        print("joined")
        pass

if __name__ == '__main__':
    runner = ApplicationRunner(url=u"ws://localhost:8888/ws",
                               realm=u"RE_acct")

    runner.run(MyComponent)

Python3

~18Mb of RAM

PyPy3

~75Mb of RAM

Start by reproducing the reported memory usage with the Twisted and asyncio ApplicationRunner examples, comparing CPython 3 and PyPy 3. Trace the ApplicationSession and runner startup paths to identify where the empty component's memory is allocated. Done means the cause is established and the reported baseline consumption is reduced or clearly documented as expected.