From d5c2a6210026834eb3cb7165e470d2cbc3065db8 Mon Sep 17 00:00:00 2001 From: Yury Selivanov Date: Wed, 16 Dec 2015 19:31:17 -0500 Subject: asyncio: Skip getaddrinfo if host is already resolved. getaddrinfo takes an exclusive lock on some platforms, causing clients to queue up waiting for the lock if many names are being resolved concurrently. Users may want to handle name resolution in their own code, for the sake of caching, using an alternate resolver, or to measure DNS duration separately from connection duration. Skip getaddrinfo if the "host" passed into create_connection is already resolved. See https://github.com/python/asyncio/pull/302 for details. Patch by A. Jesse Jiryu Davis. --- Lib/asyncio/selector_events.py | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'Lib/asyncio/selector_events.py') diff --git a/Lib/asyncio/selector_events.py b/Lib/asyncio/selector_events.py index a05f81cd9de..5b26631d80d 100644 --- a/Lib/asyncio/selector_events.py +++ b/Lib/asyncio/selector_events.py @@ -397,8 +397,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop): raise ValueError("the socket must be non-blocking") fut = futures.Future(loop=self) try: - if self._debug: - base_events._check_resolved_address(sock, address) + base_events._check_resolved_address(sock, address) except ValueError as err: fut.set_exception(err) else: -- cgit v1.2.3