Python extension loads very slowly: unresponsive

Environment data

• VS Code version: 1.55.2
• Extension version (available under the Extensions sidebar): v2021.3.680753044
• OS and version: Mac 11.2.3
• Python version (& distribution if applicable, e.g. Anaconda): 3.9.4
• Type of virtual environment used (N/A | venv | virtualenv | conda | …): N/A
• Relevant/affected Python packages and their versions: N/A
• Relevant/affected Python-related VS Code extensions and their versions: maybe Jupyter, v2021.5.745244803
• Value of the python.languageServer setting: "python.languageServer": "Pylance"

Expected behaviour

Very quick environment loading, no significant delays reported in the logs of the CPU profile (see below).

Actual behaviour

Such a long delay that I often see the pop up window saying that it is taking a long time to evaluate my environment.

Also, a log file is auto-generated showing that the python extension is often unresponsive. The log file is attached. ms-python.python-unresponsive.cpuprofile.txt

Steps to reproduce:

1. Launch VS Code with the extension installed.

Note: I also have the following Python-adjacent extensions installed:

• Jupyter
• Pylance
• Python Preview
• Python Test Explorer

Logs

They are too large to paste, provided in file:

ms-python.python-unresponsive.cpuprofile.txt

[karthiknadig]

@lazarillo You can roll back to previous released version from the extension tab. It will give you a list of versions you can roll back to.

To safely install insiders (automatically), you could set this: You can choose weekly or daily.

This step essentially does the same thing as installing from https://pvsc.blob.core.windows.net/extension-builds/ms-python-insiders.vsix . You can manually install it by using the VSIX file and “Install from VSIX” option that can be found here:

At any point to get off on the insiders, you can turn the above setting off. Or uninstall extension and install from the market place.

[karthiknadig]

@lazarillo Please try insiders version of the extension, and see if it helps with this issue. You can always download and install latest insiders build form here https://pvsc.blob.core.windows.net/extension-builds/ms-python-insiders.vsix .

If you continue to have this issue with insiders version as well, then please share the contents of the Output > Python panel.