import asyncio
import time


class CoroLikeObject:
    def send(self, v):
        raise StopIteration(42)

    def throw(self, *exc):
        pass

    def close(self):
        pass

    def __await__(self):
        return self


async def Coro():
    pass

coro = CoroLikeObject()

l = asyncio.new_event_loop()
st = time.monotonic()
for _ in range(10**6):
    l.create_task(coro)
print(f'{time.monotonic() - st:.3f}')