First socks request takes much more time when compared to other requests

[bokklu]

I've noticed that the first request always takes much more time when compared to the later requests of the same session. Below is the code to reproduce this behaviour:

async def connect_aiosocks(session, url):
    for i in range(10):
        try:
            start_time = time.time()
            async with async_timeout.timeout(7):
                async with session.get(url, proxy=f'socks4://72.11.148.222:56533') as response:
                    print(f'Request {i} {int(round((time.time() - start_time) * 1000))}ms')
        except asyncio.TimeoutError:
            continue
        except Exception as ex:
            print(ex)
            continue

async def fetch_aiosocks():
    conn = ProxyConnector(remote_resolve=False)
    async with aiohttp.ClientSession(connector=conn, request_class=ProxyClientRequest) as session:
        await connect_aiosocks(session, 'http://example.com')

if __name__ == '__main__':
    loop = asyncio.get_event_loop()
    loop.run_until_complete(fetch_aiosocks())

Output is the following:

Is this the intended behaviour?

I've tested this behaviour with the normal aiohttp library with http proxies, and it doesn't happen?