ysangkok+launchpad <ysang...@gmail.com> added the comment:

As far as our experiments show, the requests are blocking each other 
irrespective of thread pool size. Which is expected since the lock is global 
across threads.

Am I correct in assuming that an implementation for the ProactorEventLoop with 
IOCP would not require a global lock?

Here is our code, this takes 12 sec on Ubuntu and ~12*100 secs on Windows 
(cause a failed DNS request takes 10 sec):

import asyncio

futs = []
for i in range(100):
  t = asyncio.get_event_loop().getaddrinfo("aa000000aa"+str(i)+".onion.", 80)
  futs.append(t)

print(asyncio.get_event_loop().run_until_complete(asyncio.gather(*futs, 
return_exceptions=True)))

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue34411>
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