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CPU usage is 2-6% when no browser connected

See original GitHub issue

Summary

Steps to reproduce

Code snippet:

> cat ize.py # this file is empty
> streamlit run ize.py
...

1.) close browser which initially opens 2.) watch cpu usage

Expected behavior:

No cpu usage when no connection to streamlit

Actual behavior:

cpu usage is higher than expected

Is this a regression?

Debug info

Streamlit version: Streamlit, version 0.75.0
Python version: Python 3.6.9
Using Conda? PipEnv? PyEnv? Pex? - No
OS version: Linux Mint 19.2 Tina
Browser version: Firefox 86.0 (64-bit)

Issue Analytics

State:
Created 3 years ago
Comments:6 (5 by maintainers)

Top GitHub Comments

1reaction

schaumbcommented, Mar 10, 2021

I see in the code, that there is an async ‘busy’ loop, which runs always (with 0.01 sec delay):

in server.py function _loop_coroutine’s main loop.
- self._state == State.NO_BROWSERS_CONNECTED or
- self._state == State.WAITING_FOR_FIRST_BROWSER This can be fixed with that set an event for the newly connection, and wait for that.

This cause it, and I have a fix for that.

0reactions

schaumbcommented, Oct 13, 2021

The PR solved this.