Huge CPU and Memory consumption caused by design problems

[suiahae]

Issue Type: Bug

Some questions about the python plugin encountered when building python library indexes

I strongly hope that the python plugin does not read the information into memory in real time when creating the python library index, but instead saves the index file in order to speed up the time and reduce memory overhead.

The python library is really too big. Sometimes I have to wait a few minutes for writing a small amount of code.

Extension version: 2019.3.6139
VS Code version: Code 1.32.3 (a3db5be9b5c6ba46bb7555ec5d60178ecc2eaae4, 2019-03-14T23:43:35.476Z)
OS version: Windows_NT x64 10.0.17763

System Info

Item	Value
CPUs	Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz (4 x 2712)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: disabled_software rasterization: enabled surface_synchronization: enabled_on video_decode: enabled webgl: enabled webgl2: enabled
Memory (System)	15.86GB (8.60GB free)
Process Argv
Screen Reader	no
VM	46%

[algo99]

I can confirm, on Windows 10.

After update (yesterday) of Python Language Server and/or vscode_python extension VSCode not more usable. See the disk I/O and memory consumption:

The extension proceeds after VSCode start:

Analyzing in background, 6879 items left ...

and this process does not stop.
I tried several times to restart VSCode, but it does not help.

[algo99]

Just noted in Python output pane:

...
[Info  - 09:17:10] Microsoft Python Language Server version 0.2.31.0
[Info  - 09:17:10] Initializing for c:\3rd\WinPython\python-3.7.2.amd64\python.exe
Traceback (most recent call last):
  File "C:\Users\zkr\.vscode\extensions\ms-python.python-2019.3.6139\languageServer.0.2.31\scrape_module.py", line 1497, in <module>
    state.collect_second_level_members()
  File "C:\Users\zkr\.vscode\extensions\ms-python.python-2019.3.6139\languageServer.0.2.31\scrape_module.py", line 944, in collect_second_level_members
    self._collect_members(mi.value, mi.members, substitutes, mi)
  File "C:\Users\zkr\.vscode\extensions\ms-python.python-2019.3.6139\languageServer.0.2.31\scrape_module.py", line 958, in _collect_members
    raise RuntimeError("failed to import module")
RuntimeError: failed to import module
Traceback (most recent call last):
  File "C:\Users\zkr\.vscode\extensions\ms-python.python-2019.3.6139\languageServer.0.2.31\scrape_module.py", line 1497, in <module>
    state.collect_second_level_members()
  File "C:\Users\zkr\.vscode\extensions\ms-python.python-2019.3.6139\languageServer.0.2.31\scrape_module.py", line 944, in collect_second_level_members
    self._collect_members(mi.value, mi.members, substitutes, mi)
  File "C:\Users\zkr\.vscode\extensions\ms-python.python-2019.3.6139\languageServer.0.2.31\scrape_module.py", line 958, in _collect_members
    raise RuntimeError("failed to import module")
RuntimeError: failed to import module
Traceback (most recent call last):
  File "C:\Users\zkr\.vscode\extensions\ms-python.python-2019.3.6139\languageServer.0.2.31\scrape_module.py", line 1489, in <module>
    state.initial_import(sys.argv[2])
  File "C:\Users\zkr\.vscode\extensions\ms-python.python-2019.3.6139\languageServer.0.2.31\scrape_module.py", line 872, in initial_import
    mod = __import__(self.module_name)
  File "c:\3rd\winpython\python-3.7.2.amd64\lib\site-packages\cvxopt\__init__.py", line 50, in <module>
    import cvxopt.base
ImportError: DLL load failed: Das angegebene Modul wurde nicht gefunden.

[dilzeem]

I am also getting the same issue as well on Windows 10.

It only happens once I start debugging some code.
It renders VScode unusable.

[suiahae]

It only happens when the python plugin loads the python library, which requires a lot of CPU and memory. And these information that is loaded into memory is estimated to be used for IntelliCode.

[ray306]

The same problem happens today. I think it's a bug of new Python plugin just released yesterday (March 26).

[dilzeem]

Possibly a duplicate of of this in the python language server:

microsoft/python-language-server#450

[suiahae]

Possibly a duplicate of of this in the python language server:

Microsoft/python-language-server#450

I also think that the issues area of the python plugin has a large part of similar content related to such a bug. It seems that this bug is very disturbing programming and needs to be solved urgently. ;-)

[gramster]

Please add further reports and repro cases to microsoft/python-language-server#832

[nbara]

Can you kindly provide instructions to downgrade extension/language-server version until this is fixed ? This issue makes VSCode completely unusable for me as it is...