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Event service will now sleep for 100ms between polls instead of 1ms, reducing CPU usage significantly (#3256)

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I noticed that the current invokeai-new.py was using almost all of a CPU
core. After a bit of profileing I noticed that there were many thousands
of calls to epoll() which suggested to me that something wasn't sleeping
properly in asyncio's loop.

A bit of further investigation with Python profiling revealed that the
__dispatch_from_queue() method in FastAPIEventService
(app/api/events.py:33) was also being called thousands of times.

I believe the asyncio.sleep(0.001) in that method is too aggressive (it
means that the queue will be polled every 1ms) and that 0.1 (100ms) is
still entirely reasonable.
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blessedcoolant 2023-04-24 19:35:27 +12:00 committed by GitHub
commit 7555b1f876
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invokeai/app/api/events.py
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@ -45,7 +45,7 @@ class FastAPIEventService(EventServiceBase):
)
except Empty:
await asyncio.sleep(0.001)
await asyncio.sleep(0.1)
pass
except asyncio.CancelledError as e: