Many zombie Python processes created with high CPU usage.

[valerierose]

Environment data

• VS Code version: 1.42.1 (also seen with 1.42, 1.41.1)
• Extension version (available under the Extensions sidebar): 2020.2.64397
• OS and version: Mac Catalina
• Python version (& distribution if applicable, e.g. Anaconda): 3.6.4
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): venv

Expected behaviour

I can use the plugin and any Python processes that get spawned use a modest amount of CPU and exit when done. My tests take about 1 minute.

Actual behaviour

Using this extension causes Python processes using high CPU to get spawned and stick around until I force quit them. The more VS Code tabs I open, the more processes get spawned. Tests take 5x as long.

Steps to reproduce:

[NOTE: Self-contained, minimal reproducing code samples are extremely helpful and will expedite addressing your issue]

1. With the plugin installed, open several tabs of Python code. Test and lint as normal.
2. Observe the activity monitor.

[karrtikr]

Hi @valerierose
We would need to know the type of processes the extension launches. It could be related to debugging, intellisense, or something else in the extension. Can you please send the details about these processes you see?

[valerierose]

Where would I find that information?

What I see is several python3.6 processes in my Activity Monitor, each using a lot of CPU.

[karrtikr]

Sorry I missed your response. You could try the command for Mac.
i.e ps axww -o pid=,args= -c

and paste the python processes you see.

Or better, try to use the process picker UI in the extension to easily filter out the python processes.

• Add the following setting in user settings.json

    "python.experiments.optInto": [
        "All"
    ]

Reload the window.

• Add python debug configuration in launch.json - Attach using process Id.
• Debug using that configuration

A list of processes with details should appear, the python processes should appear first.

[karrtikr]

Closing as no further info was provided.