diff options
Diffstat (limited to 'Lib/asyncio/base_events.py')
| -rw-r--r-- | Lib/asyncio/base_events.py | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Lib/asyncio/base_events.py b/Lib/asyncio/base_events.py index 558406c272f..4207a7e9f1e 100644 --- a/Lib/asyncio/base_events.py +++ b/Lib/asyncio/base_events.py @@ -633,7 +633,13 @@ class BaseEventLoop(events.AbstractEventLoop): else: logger.log(level, 'poll took %.3f seconds', t1-t0) else: + t0 = self.time() event_list = self._selector.select(timeout) + dt = self.time() - t0 + if not event_list and timeout and dt < timeout: + print("asyncio: selector.select(%.3f ms) took %.3f ms" + % (timeout*1e3, dt*1e3), + file=sys.__stderr__, flush=True) self._process_events(event_list) # Handle 'later' callbacks that are ready. |