Python Environments extension causes significant UI lag/freezing in VS Code #1594

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   triage-needed

   on Jun 18, 2026
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   triage-needed

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   Don Jayamanne (DonJayamanne)

   on Jun 18, 2026
4. eleanorjboyd commented on Jun 22, 2026

   

   Eleanor Boyd (eleanorjboyd)

   on Jun 22, 2026

   Contributor

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   Thanks for reporting this. To help confirm whether the lag is coming from the Python Environments extension specifically, could you try the same scenario with the Python Environments extension disabled?

   1. Open VS Code.
   2. Go to the Extensions view.
   3. Find Python Environments (ms-python.vscode-python-envs).
   4. Click Disable.
   5. Reload the VS Code window when prompted.
   6. Open the same workspace / Python file where you see the lag.
   7. Check whether typing, panel switching, and general UI responsiveness improve.

   If the lag goes away with Python Environments disabled, please re-enable it and collect the extension logs:

   1. Run Developer: Set Log Level... from the Command Palette.
   2. Choose Trace.
   3. Reload the window.
   4. Reproduce the lag.
   5. Open View → Output.
   6. Select Python Environments from the Output dropdown.
   7. Copy the relevant logs here, especially any environment discovery timing warnings.

   If the lag still happens with Python Environments disabled, that would suggest the issue may be elsewhere in VS Code or another extension, but please let us know either way.
5. Eleanor Boyd (eleanorjboyd)

   closed this as completedon Sep 23, 2026