Profile an async websocket application

Question

I have been trying to improve one websocket application I wrote based on asyncio and websockets.

In the profiling output I see the most time consuming part is method 'control' of 'select.kqueue' objects:

I do not really know what does this means:

Does this mean most of time I'm waiting for message?
Or does this mean I have too many tasks/coroutines that context switching is costing too much time?

Andrew Svetlov · Accepted Answer · 2018-10-16 20:21:19Z

1

It means that asyncio is waiting for new events, most likely for websocket incoming messages for your case.

Consider it as idle time.

answered Oct 16, 2018 at 20:21

Andrew Svetlov

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1 Comment

ah ok, thanks. So it's the server that is not fast enough, as I have plenty of bandwidth to spare