Heavy CPU usage

[amirhosseindavoody]

Environment data

• VS Code version: 1.25.1
• Extension version (available under the Extensions sidebar): 2018.6.0
• OS and version: MacOS High Sierra
• Python version (& distribution if applicable, e.g. Anaconda): 3.6.6
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): Conda
• Relevant/affected Python packages and their versions: Dash 0.21.1

Actual behavior

I am writing an app using Dash library. The extension would fire up a python process pretty frequently that is pretty CPU heavy. I am not sure what the process does, but I am suspecting that it is trying to do something that helps the autocompletion feature. Also, the autocomplete or suggestions are pretty slow. Anybody else with the same experience?

[MikhailArkhipov]

I assume you are using default Jedi completion. I wonder if you can try insider's build and set python.jediEnabled to false to try new Python language server.

[amirhosseindavoody]

Thanks for the tip. I will try it out and let you know how it goes.

[samhinshaw]

I am having this issue as well! Tested on code 1.25 and insiders 1.26 (2018-07-20). Python extension version 2018.7.0. I am using a python 3.6.5 venv via pyenv with yapf autoformatting. MacOS High Sierra 10.13.6.

Tested with "python.jediEnabled": false and not.

[samhinshaw]

It seems to be tied to linting. When I save, CPU usage spikes and my pylint results take quite a while to appear. Once the linting results have appeared, CPU usage returns to normal. Interestingly, the CPU usage does not appear in Code's Process Explorer, but does appear in Activity Monitor.

CPU %	Memory (MB)	pid	Name
2	115	98038	code main
5	147	98104	     gpu-process
0	311	98110	     window (course.py — rudaux)
0	197	98113	         extensionHost
0	66	98363	             /Users/samhinshaw/.pyenv/versions/recent/bin/python completion.py
0	16	98406	                 python3.6 /Users/samhinshaw/.vscode/extensions/ms-python.python-2018.7.1/pythonFiles/jedi/evaluate/compiled/subprocess/__main__.py /Users/samhinshaw/.vscode/extensions/ms-python.python-2018.7.1/pythonFiles
0	16	99366	                 /Users/samhinshaw/.pyenv/versions/recent/bin/python /Users/samhinshaw/.vscode/extensions/ms-python.python-2018.7.1/pythonFiles/jedi/evaluate/compiled/subprocess/__main__.py /Users/samhinshaw/.vscode/extensions/ms-python.python-2018.7.1/pythonFiles
0	49	98114	         watcherService
0	49	98212	         searchService
0	131	98115	     shared-process
0	229	98751	     window (rudaux_config.py — DSCI_100_instructors)
0	147	98752	         extensionHost
0	16	99134	             python completion.py
0	16	99155	                 /Users/samhinshaw/.pyenv/versions/3.6.5/envs/recent/bin/python 
/Users/samhinshaw/.vscode/extensions/ms-python.python-2018.7.1/pythonFiles/jedi/evaluate/compiled/subprocess/__main__.py /Users/samhinshaw/.vscode/extensions/ms-python.python-2018.7.1/pythonFiles
0	49	98753	         watcherService
0	49	98899	         searchService

More information in a gist

[anribras]

Same issues .

Code version: 1.25.1
vs-python : 2018.7.1

Cpu load is really huge when Jedi is doing some completion job and all operations become very slow.

[brettcannon]

@anribras what OS are you running?

@amirhosseindavoody Are you running Pylint?

[anribras]

@brettcannon Ubuntu 16.04
I think VS Code completion for large-scale external libs like wxpython , is really slow , and much slower than Pycharm I have to say. Maybe Jedi should be the reason.