Slow completion for large Python packages when using the default pyls

See original GitHub issue

Description

Autocompletion - especially of bigger packages like pandas is slow.

Reproduce

Go to Jupyterlab
Write import pandas as pd
Write pd.<tab>
It takes seconds in Jupyterlab, in classic notebook it is immediately autocompleted.

Is it usual behavior or there is something wrong configured?

Expected behavior

Autocompletion finished nearly immediately 😃

Context

Operating System and version: Linux b832f09e7bfa 5.4.0-7626-generic #30~1588169883~20.04~bbe668a-Ubuntu SMP x86_64 x86_64 x86_64 GNU/Linux - Docker
Browser and version: Chrome Version 81.0.4044.138 (Official Build) (64-bit)
JupyterLab version: Jupyterlab version 2.1.0 (same behavior was with 2.1.2)

Required: installed server extensions

config dir: /home/jovyan/.jupyter
    jupyterlab_git  enabled 
config dir: /opt/conda/etc/jupyter
    jupyter_lsp  enabled 
    jupyterlab  enabled 
    jupyterlab_git  enabled 
    nbdime  enabled 
    - Validating...
      jupyterlab_git 0.20.0 OK
    - Validating...
      jupyter_lsp 0.8.0 OK
    - Validating...
      jupyterlab 2.1.0 OK
    - Validating...
      jupyterlab_git 0.20.0 OK
    - Validating...
      nbdime 2.0.0 OK

Required: installed lab extensions

   app dir: /opt/conda/share/jupyter/lab
        @aquirdturtle/collapsible_headings v2.2.0  enabled  OK
        @bokeh/jupyter_bokeh v2.0.0  enabled  OK
        @jupyter-widgets/jupyterlab-manager v2.0.0  enabled  OK
        @jupyterlab/git v0.20.0  enabled  OK
        @krassowski/jupyterlab-lsp v1.0.0  enabled  OK
        jupyter-matplotlib v0.7.2  enabled  OK
        jupyterlab-plotly v1.5.4  enabled  OK
        jupyterlab-python-file v0.4.0  enabled  OK
        nbdime-jupyterlab v2.0.0  enabled  OK
        plotlywidget v1.5.4  enabled  OK
        qgrid2 v1.1.3  enabled  OK

Troubleshoot Output

$PATH: /opt/conda/bin /usr/local/sbin /usr/local/bin /usr/sbin /usr/bin /sbin /bin

sys.path: /opt/conda/bin /opt/conda/lib/python37.zip /opt/conda/lib/python3.7 /opt/conda/lib/python3.7/lib-dynload /opt/conda/lib/python3.7/site-packages

sys.executable: /opt/conda/bin/python

sys.version: 3.7.6 | packaged by conda-forge | (default, Mar 5 2020, 15:27:18) [GCC 7.3.0]

platform.platform(): Linux-5.4.0-7626-generic-x86_64-with-debian-buster-sid

which -a jupyter: /opt/conda/bin/jupyter

pip list: Package Version
-------------------------- ------------------- alembic 1.4.1
asn1crypto 1.3.0
astroid 2.4.1
async-generator 1.10
attrs 19.3.0
autopep8 1.5.2
azure-common 1.1.25
azure-storage-blob 1.5.0
azure-storage-common 1.4.2
backcall 0.1.0
beautifulsoup4 4.8.2
bleach 3.1.3
blinker 1.4
bokeh 1.4.0
boto3 1.13.12
botocore 1.16.12
certifi 2020.4.5.1
certipy 0.1.3
cffi 1.13.2
chardet 3.0.4
click 7.1.1
cloudpickle 1.3.0
colorama 0.4.3
conda 4.8.2
conda-package-handling 1.6.0
convertdate 2.2.1
cooked-input 0.5.2
coverage 5.1
cryptography 2.8
cycler 0.10.0
Cython 0.29.15
cytoolz 0.10.1
dask 2.11.0
dateparser 0.7.4
decorator 4.4.2
defusedxml 0.6.0
dill 0.3.1.1
distributed 2.12.0
docutils 0.15.2
entrypoints 0.3
enum34 1.1.10
et-xmlfile 1.0.1
flake8 3.8.1
Flask 1.1.2
Flask-Login 0.5.0
Flask-Mail 0.9.1
Flask-Migrate 2.5.3
Flask-Principal 0.4.0
Flask-SQLAlchemy 2.4.1
fsspec 0.6.2
future 0.18.2
gitdb 4.0.5
GitPython 3.1.2
gunicorn 20.0.4
h5py 2.10.0
HeapDict 1.0.1
holidays 0.10.2
idna 2.9
ijson 2.6.1
imageio 2.8.0
importlib-metadata 1.5.0
inflection 0.4.0
ipykernel 5.1.4
ipympl 0.5.3
ipython 7.13.0
ipython-genutils 0.2.0
ipython-sql 0.3.9
ipywidgets 7.5.1
isort 4.3.21
itsdangerous 1.1.0
jdcal 1.4.1
jedi 0.17.0
Jinja2 2.11.1
jmespath 0.10.0
joblib 0.14.1
json5 0.9.0
jsonschema 3.2.0
jupyter-client 6.0.0
jupyter-core 4.6.3
jupyter-lsp 0.8.0
jupyter-telemetry 0.0.5
jupyterhub 1.1.0
jupyterlab 2.1.0
jupyterlab-git 0.20.0
jupyterlab-server 1.1.4
kiwisolver 1.1.0
knowledge-repo 0.8.8
korean-lunar-calendar 0.2.1
lazy-object-proxy 1.4.3
llvmlite 0.31.0
locket 0.2.0
Mako 1.1.0
Markdown 3.2.2
MarkupSafe 1.1.1
matplotlib 3.2.1
mccabe 0.6.1
mistune 0.8.4
mpmath 1.1.0
msgpack 1.0.0
nbconvert 5.6.1
nbdime 2.0.0
nbformat 5.0.4
networkx 2.4
nose 1.3.7
notebook 6.0.3
numba 0.48.0
numexpr 2.7.1
numpy 1.18.1
oauthlib 3.0.1
olefile 0.46
openpyxl 3.0.3
oscrypto 1.2.0
packaging 20.1
pamela 1.0.0
pandas 1.0.2
pandocfilters 1.4.2
parso 0.7.0
partd 1.1.0
patsy 0.5.1
pexpect 4.8.0
pickleshare 0.7.5
Pillow 7.0.0
pip 20.0.2
plotly 4.5.4
pluggy 0.13.1
prettytable 0.7.2
prometheus-client 0.7.1
prompt-toolkit 3.0.4
protobuf 3.11.4
psutil 5.7.0
ptyprocess 0.6.0
pycodestyle 2.6.0
pycosat 0.6.3
pycparser 2.20
pycryptodomex 3.9.7
pycurl 7.43.0.5
pydocstyle 5.0.2
pyflakes 2.2.0
Pygments 2.6.1
PyJWT 1.7.1
pylint 2.5.2
PyMeeus 0.3.7
pyOpenSSL 19.1.0
pyparsing 2.4.6
PyPDF2 1.26.0
pyrsistent 0.15.7
PySocks 1.7.1
python-dateutil 2.8.1
python-editor 1.0.4
python-json-logger 0.1.11
python-jsonrpc-server 0.3.4
python-language-server 0.32.0
pytz 2019.3
PyWavelets 1.1.1
PyYAML 5.3
pyzmq 19.0.0
qgrid 1.3.1
regex 2020.5.14
requests 2.23.0
requests-oauthlib 1.3.0
retrying 1.3.3
rope 0.17.0
ruamel-yaml 0.15.80
ruamel.yaml 0.16.6
ruamel.yaml.clib 0.2.0
s3transfer 0.3.3
scikit-image 0.16.2
scikit-learn 0.22.2.post1
scipy 1.4.1
seaborn 0.10.0
Send2Trash 1.5.0
setuptools 46.0.0.post20200311 setuptools-git 1.2
six 1.14.0
smmap 3.0.4
snowballstemmer 2.0.0
snowflake-connector-python 2.2.6
snowflake-sqlalchemy 1.2.2
sortedcontainers 2.1.0
soupsieve 1.9.4
SQLAlchemy 1.3.15
sqlparse 0.3.1
statsmodels 0.11.1
sympy 1.5.1
tabulate 0.8.7
tblib 1.6.0
termcolor 1.1.0
terminado 0.8.3
testpath 0.4.4
toml 0.10.1
toolz 0.10.0
tornado 6.0.4
tqdm 4.43.0
traitlets 4.3.3
typed-ast 1.4.1
tzlocal 2.1
ujson 1.35
urllib3 1.25.7
validus 0.3.0
veryprettytable 0.8.1
vincent 0.4.4
Wand 0.6.1
wcwidth 0.1.8
webencodings 0.5.1
Werkzeug 1.0.1
wheel 0.34.2
widgetsnbextension 3.5.1
wrapt 1.12.1
xlrd 1.2.0
yapf 0.30.0
zict 2.0.0
zipp 3.1.0

conda list: # packages in environment at /opt/conda: # # Name Version Build Channel _libgcc_mutex 0.1 conda_forge conda-forge _openmp_mutex 4.5 0_gnu conda-forge alembic 1.4.1 py_0 conda-forge asn1crypto 1.3.0 pypi_0 pypi astroid 2.4.1 pypi_0 pypi async_generator 1.10 py_0 conda-forge attrs 19.3.0 py_0 conda-forge autopep8 1.5.2 pypi_0 pypi azure-common 1.1.25 pypi_0 pypi azure-storage-blob 1.5.0 pypi_0 pypi azure-storage-common 1.4.2 pypi_0 pypi backcall 0.1.0 py_0 conda-forge beautifulsoup4 4.8.2 py37_0 conda-forge blas 2.14 openblas conda-forge bleach 3.1.3 pyh8c360ce_0 conda-forge blinker 1.4 py_1 conda-forge bokeh 1.4.0 py37_0 conda-forge boto3 1.13.12 pypi_0 pypi botocore 1.16.12 pypi_0 pypi ca-certificates 2020.4.5.1 hecc5488_0 conda-forge certifi 2020.4.5.1 py37hc8dfbb8_0 conda-forge certipy 0.1.3 py_0 conda-forge cffi 1.13.2 pypi_0 pypi chardet 3.0.4 py37hc8dfbb8_1006 conda-forge click 7.1.1 pyh8c360ce_0 conda-forge cloudpickle 1.3.0 py_0 conda-forge colorama 0.4.3 pypi_0 pypi conda 4.8.2 py37_0 conda-forge conda-package-handling 1.6.0 py37h8f50634_2 conda-forge configurable-http-proxy 4.2.0 node13_he01fd0c_2 conda-forge convertdate 2.2.1 pypi_0 pypi cooked-input 0.5.2 pypi_0 pypi coverage 5.1 pypi_0 pypi cryptography 2.8 py37hb09aad4_2 conda-forge cycler 0.10.0 py_2 conda-forge cython 0.29.15 py37h3340039_1 conda-forge cytoolz 0.10.1 py37h516909a_0 conda-forge dask 2.11.0 py_0 conda-forge dask-core 2.11.0 py_0 conda-forge dateparser 0.7.4 pypi_0 pypi decorator 4.4.2 py_0 conda-forge defusedxml 0.6.0 py_0 conda-forge dill 0.3.1.1 py37hc8dfbb8_1 conda-forge distributed 2.12.0 py37_0 conda-forge docutils 0.15.2 pypi_0 pypi entrypoints 0.3 py37hc8dfbb8_1001 conda-forge enum34 1.1.10 pypi_0 pypi et-xmlfile 1.0.1 pypi_0 pypi flake8 3.8.1 pypi_0 pypi flask 1.1.2 pypi_0 pypi flask-login 0.5.0 pypi_0 pypi flask-mail 0.9.1 pypi_0 pypi flask-migrate 2.5.3 pypi_0 pypi flask-principal 0.4.0 pypi_0 pypi flask-sqlalchemy 2.4.1 pypi_0 pypi freetype 2.10.0 he983fc9_1 conda-forge fsspec 0.6.2 py_0 conda-forge future 0.18.2 pypi_0 pypi giflib 5.2.1 h516909a_2 conda-forge gitdb 4.0.5 pypi_0 pypi gitpython 3.1.2 pypi_0 pypi gunicorn 20.0.4 pypi_0 pypi h5py 2.10.0 nompi_py37h513d04c_102 conda-forge hdf5 1.10.5 nompi_h3c11f04_1104 conda-forge heapdict 1.0.1 py_0 conda-forge holidays 0.10.2 pypi_0 pypi icu 64.2 he1b5a44_1 conda-forge idna 2.9 py_1 conda-forge ijson 2.6.1 pypi_0 pypi imageio 2.8.0 py_0 conda-forge importlib-metadata 1.5.0 py37hc8dfbb8_1 conda-forge importlib_metadata 1.5.0 1 conda-forge inflection 0.4.0 pypi_0 pypi ipykernel 5.1.4 py37h5ca1d4c_0 conda-forge ipympl 0.5.3 py_0 conda-forge ipython 7.13.0 py37h5ca1d4c_0 conda-forge ipython-sql 0.3.9 pypi_0 pypi ipython_genutils 0.2.0 py_1 conda-forge ipywidgets 7.5.1 py_0 conda-forge isort 4.3.21 pypi_0 pypi itsdangerous 1.1.0 pypi_0 pypi jdcal 1.4.1 pypi_0 pypi jedi 0.17.0 pypi_0 pypi jinja2 2.11.1 py_0 conda-forge jmespath 0.10.0 pypi_0 pypi joblib 0.14.1 py_0 conda-forge jpeg 9c h14c3975_1001 conda-forge json5 0.9.0 py_0 conda-forge jsonschema 3.2.0 py37hc8dfbb8_1 conda-forge jupyter-lsp 0.8.0 pypi_0 pypi jupyter_client 6.0.0 py_0 conda-forge jupyter_core 4.6.3 py37hc8dfbb8_1 conda-forge jupyter_telemetry 0.0.5 py_0 conda-forge jupyterhub 1.1.0 py37_2 conda-forge jupyterhub-base 1.1.0 py37_2 conda-forge jupyterlab 2.1.0 pypi_0 pypi jupyterlab-git 0.20.0 pypi_0 pypi jupyterlab-server 1.1.4 pypi_0 pypi kiwisolver 1.1.0 py37h99015e2_1 conda-forge knowledge-repo 0.8.8 pypi_0 pypi korean-lunar-calendar 0.2.1 pypi_0 pypi krb5 1.16.4 h2fd8d38_0 conda-forge lazy-object-proxy 1.4.3 pypi_0 pypi ld_impl_linux-64 2.33.1 h53a641e_8 conda-forge libblas 3.8.0 14_openblas conda-forge libcblas 3.8.0 14_openblas conda-forge libcurl 7.68.0 hda55be3_0 conda-forge libedit 3.1.20170329 hf8c457e_1001 conda-forge libffi 3.2.1 he1b5a44_1006 conda-forge libgcc-ng 9.2.0 h24d8f2e_2 conda-forge libgfortran-ng 7.3.0 hdf63c60_5 conda-forge libgomp 9.2.0 h24d8f2e_2 conda-forge liblapack 3.8.0 14_openblas conda-forge liblapacke 3.8.0 14_openblas conda-forge libllvm8 8.0.1 hc9558a2_0 conda-forge libopenblas 0.3.7 h5ec1e0e_6 conda-forge libpng 1.6.37 hed695b0_0 conda-forge libprotobuf 3.11.4 h8b12597_0 conda-forge libsodium 1.0.17 h516909a_0 conda-forge libssh2 1.8.2 h22169c7_2 conda-forge libstdcxx-ng 9.2.0 hdf63c60_2 conda-forge libtiff 4.1.0 hc7e4089_5 conda-forge libuv 1.34.0 h516909a_0 conda-forge libwebp 1.1.0 h56121f0_2 conda-forge libwebp-base 1.1.0 2 conda-forge llvmlite 0.31.0 py37h5202443_1 conda-forge locket 0.2.0 py_2 conda-forge lz4-c 1.8.3 he1b5a44_1001 conda-forge mako 1.1.0 py_0 conda-forge markdown 3.2.2 pypi_0 pypi markupsafe 1.1.1 py37h8f50634_1 conda-forge matplotlib 3.2.1 pypi_0 pypi mccabe 0.6.1 pypi_0 pypi mistune 0.8.4 py37h516909a_1000 conda-forge mpmath 1.1.0 py_0 conda-forge msgpack-python 1.0.0 py37h99015e2_1 conda-forge nbconvert 5.6.1 py37_0 conda-forge nbdime 2.0.0 pypi_0 pypi nbformat 5.0.4 py_0 conda-forge ncurses 6.1 hf484d3e_1002 conda-forge networkx 2.4 py_1 conda-forge nodejs 13.10.1 hf5d1a2b_0 conda-forge nose 1.3.7 pypi_0 pypi notebook 6.0.3 py37_0 conda-forge numba 0.48.0 py37hb3f55d8_0 conda-forge numexpr 2.7.1 py37hb3f55d8_0 conda-forge numpy 1.18.1 py37h95a1406_0 conda-forge oauthlib 3.0.1 py_0 conda-forge olefile 0.46 py_0 conda-forge openpyxl 3.0.3 pypi_0 pypi openssl 1.1.1g h516909a_0 conda-forge oscrypto 1.2.0 pypi_0 pypi packaging 20.1 py_0 conda-forge pamela 1.0.0 py_0 conda-forge pandas 1.0.2 py37h0da4684_0 conda-forge pandoc 2.9.2 0 conda-forge pandocfilters 1.4.2 py_1 conda-forge parso 0.7.0 pypi_0 pypi partd 1.1.0 py_0 conda-forge patsy 0.5.1 py_0 conda-forge pexpect 4.8.0 py37hc8dfbb8_1 conda-forge pickleshare 0.7.5 py37hc8dfbb8_1001 conda-forge pillow 7.0.0 py37h718be6c_1 conda-forge pip 20.0.2 py_2 conda-forge plotly 4.5.4 pypi_0 pypi pluggy 0.13.1 pypi_0 pypi prettytable 0.7.2 pypi_0 pypi prometheus_client 0.7.1 py_0 conda-forge prompt-toolkit 3.0.4 py_0 conda-forge prompt_toolkit 3.0.4 0 conda-forge protobuf 3.11.4 py37he1b5a44_0 conda-forge psutil 5.7.0 py37h8f50634_1 conda-forge ptyprocess 0.6.0 py_1001 conda-forge pycodestyle 2.6.0 pypi_0 pypi pycosat 0.6.3 py37h8f50634_1004 conda-forge pycparser 2.20 py_0 conda-forge pycryptodomex 3.9.7 pypi_0 pypi pycurl 7.43.0.5 py37h16ce93b_0 conda-forge pydocstyle 5.0.2 pypi_0 pypi pyflakes 2.2.0 pypi_0 pypi pygments 2.6.1 py_0 conda-forge pyjwt 1.7.1 py_0 conda-forge pylint 2.5.2 pypi_0 pypi pymeeus 0.3.7 pypi_0 pypi pyopenssl 19.1.0 py_1 conda-forge pyparsing 2.4.6 py_0 conda-forge pypdf2 1.26.0 pypi_0 pypi pyrsistent 0.15.7 py37h8f50634_1 conda-forge pysocks 1.7.1 py37hc8dfbb8_1 conda-forge python 3.7.6 h357f687_4_cpython conda-forge python-dateutil 2.8.1 py_0 conda-forge python-editor 1.0.4 py_0 conda-forge python-json-logger 0.1.11 py_0 conda-forge python-jsonrpc-server 0.3.4 pypi_0 pypi python-language-server 0.32.0 pypi_0 pypi python_abi 3.7 1_cp37m conda-forge pytz 2019.3 py_0 conda-forge pywavelets 1.1.1 py37hc1659b7_0 conda-forge pyyaml 5.3 py37h8f50634_1 conda-forge pyzmq 19.0.0 py37hac76be4_1 conda-forge qgrid 1.3.1 pypi_0 pypi readline 8.0 hf8c457e_0 conda-forge regex 2020.5.14 pypi_0 pypi requests 2.23.0 pyh8c360ce_2 conda-forge requests-oauthlib 1.3.0 pypi_0 pypi retrying 1.3.3 pypi_0 pypi rope 0.17.0 pypi_0 pypi ruamel.yaml 0.16.6 py37h8f50634_1 conda-forge ruamel.yaml.clib 0.2.0 py37h8f50634_1 conda-forge ruamel_yaml 0.15.80 py37h8f50634_1001 conda-forge s3transfer 0.3.3 pypi_0 pypi scikit-image 0.16.2 py37hb3f55d8_0 conda-forge scikit-learn 0.22.2.post1 py37hcdab131_0 conda-forge scipy 1.4.1 py37h921218d_0 conda-forge seaborn 0.10.0 py_1 conda-forge send2trash 1.5.0 py_0 conda-forge setuptools 46.0.0 py37hc8dfbb8_2 conda-forge setuptools-git 1.2 pypi_0 pypi six 1.14.0 py_1 conda-forge smmap 3.0.4 pypi_0 pypi snowballstemmer 2.0.0 pypi_0 pypi snowflake-connector-python 2.2.6 pypi_0 pypi snowflake-sqlalchemy 1.2.2 pypi_0 pypi sortedcontainers 2.1.0 py_0 conda-forge soupsieve 1.9.4 py37hc8dfbb8_1 conda-forge sqlalchemy 1.3.15 py37h8f50634_1 conda-forge sqlite 3.30.1 hcee41ef_0 conda-forge sqlparse 0.3.1 pypi_0 pypi statsmodels 0.11.1 py37h8f50634_1 conda-forge sympy 1.5.1 py37hc8dfbb8_2 conda-forge tabulate 0.8.7 pypi_0 pypi tblib 1.6.0 py_0 conda-forge termcolor 1.1.0 pypi_0 pypi terminado 0.8.3 py37hc8dfbb8_1 conda-forge testpath 0.4.4 py_0 conda-forge tini 0.18.0 h14c3975_1001 conda-forge tk 8.6.10 hed695b0_0 conda-forge toml 0.10.1 pypi_0 pypi toolz 0.10.0 py_0 conda-forge tornado 6.0.4 py37h8f50634_1 conda-forge tqdm 4.43.0 py_0 conda-forge traitlets 4.3.3 py37hc8dfbb8_1 conda-forge typed-ast 1.4.1 pypi_0 pypi tzlocal 2.1 pypi_0 pypi ujson 1.35 pypi_0 pypi urllib3 1.25.7 py37hc8dfbb8_1 conda-forge validus 0.3.0 pypi_0 pypi veryprettytable 0.8.1 pypi_0 pypi vincent 0.4.4 py_1 conda-forge wand 0.6.1 pypi_0 pypi wcwidth 0.1.8 py_0 conda-forge webencodings 0.5.1 py_1 conda-forge werkzeug 1.0.1 pypi_0 pypi wheel 0.34.2 py_1 conda-forge widgetsnbextension 3.5.1 py37_0 conda-forge wrapt 1.12.1 pypi_0 pypi xlrd 1.2.0 py_0 conda-forge xz 5.2.4 h14c3975_1001 conda-forge yaml 0.2.2 h516909a_1 conda-forge yapf 0.30.0 pypi_0 pypi zeromq 4.3.2 he1b5a44_2 conda-forge zict 2.0.0 py_0 conda-forge zipp 3.1.0 py_0 conda-forge zlib 1.2.11 h516909a_1006 conda-forge zstd 1.4.4 h3b9ef0a_1 conda-forge

Command Line Output

[D 19:50:19.900 LabApp] Searching ['/home/jovyan/.jupyter', '/home/jovyan/.jupyter', '/opt/conda/etc/jupyter', '/usr/local/etc/jupyter', '/etc/jupyter'] for config files
[D 19:50:19.900 LabApp] Looking for jupyter_config in /etc/jupyter
[D 19:50:19.900 LabApp] Looking for jupyter_config in /usr/local/etc/jupyter
[D 19:50:19.901 LabApp] Looking for jupyter_config in /opt/conda/etc/jupyter
[D 19:50:19.901 LabApp] Looking for jupyter_config in /home/jovyan/.jupyter
[D 19:50:19.901 LabApp] Looking for jupyter_config in /home/jovyan/.jupyter
[D 19:50:19.904 LabApp] Looking for jupyter_notebook_config in /etc/jupyter
[D 19:50:19.904 LabApp] Loaded config file: /etc/jupyter/jupyter_notebook_config.py
[D 19:50:19.905 LabApp] Looking for jupyter_notebook_config in /usr/local/etc/jupyter
[D 19:50:19.905 LabApp] Looking for jupyter_notebook_config in /opt/conda/etc/jupyter
[D 19:50:19.905 LabApp] Looking for jupyter_notebook_config in /home/jovyan/.jupyter
[D 19:50:19.906 LabApp] Loaded config file: /home/jovyan/.jupyter/jupyter_notebook_config.py
[D 19:50:19.906 LabApp] Loaded config file: /home/jovyan/.jupyter/jupyter_notebook_config.json
[D 19:50:19.906 LabApp] Looking for jupyter_notebook_config in /home/jovyan/.jupyter
[D 19:50:19.906 LabApp] Loaded config file: /home/jovyan/.jupyter/jupyter_notebook_config.py
[D 19:50:19.907 LabApp] Loaded config file: /home/jovyan/.jupyter/jupyter_notebook_config.json
[D 19:50:19.919 LabApp] Paths used for configuration of jupyter_notebook_config: 
        /etc/jupyter/jupyter_notebook_config.json
[D 19:50:19.920 LabApp] Paths used for configuration of jupyter_notebook_config: 
        /usr/local/etc/jupyter/jupyter_notebook_config.json
[D 19:50:19.921 LabApp] Paths used for configuration of jupyter_notebook_config: 
        /opt/conda/etc/jupyter/jupyter_notebook_config.d/jupyter-lsp-serverextension.json
        /opt/conda/etc/jupyter/jupyter_notebook_config.d/jupyterlab.json
        /opt/conda/etc/jupyter/jupyter_notebook_config.d/jupyterlab_git.json
        /opt/conda/etc/jupyter/jupyter_notebook_config.d/nbdime.json
        /opt/conda/etc/jupyter/jupyter_notebook_config.json
[D 19:50:19.922 LabApp] Paths used for configuration of jupyter_notebook_config: 
        /home/jovyan/.jupyter/jupyter_notebook_config.json
[I 19:50:20.255 LabApp] The port 8888 is already in use, trying another port.
[D 19:50:20.312 LabApp] Checking for /home/jovyan/.jupyter/node_modules/bash-language-server/bin/main.js
[D 19:50:20.312 LabApp] Checking for /opt/conda/share/jupyter/lab/staging/node_modules/bash-language-server/bin/main.js
[D 19:50:20.313 LabApp] Checking for /opt/conda/lib/node_modules/bash-language-server/bin/main.js
[D 19:50:20.313 LabApp] Checking for /opt/conda/node_modules/bash-language-server/bin/main.js
[D 19:50:20.313 LabApp] bash-language-server/bin/main.js not found in node_modules of [PosixPath('/home/jovyan/.jupyter'), PosixPath('/opt/conda/share/jupyter/lab/staging'), PosixPath('/opt/conda/lib'), PosixPath('/opt/conda')]
[D 19:50:20.313 LabApp] Checking for /home/jovyan/.jupyter/node_modules/dockerfile-language-server-nodejs/lib/server.js
[D 19:50:20.313 LabApp] Checking for /opt/conda/share/jupyter/lab/staging/node_modules/dockerfile-language-server-nodejs/lib/server.js
[D 19:50:20.313 LabApp] Checking for /opt/conda/lib/node_modules/dockerfile-language-server-nodejs/lib/server.js
[D 19:50:20.314 LabApp] Checking for /opt/conda/node_modules/dockerfile-language-server-nodejs/lib/server.js
[D 19:50:20.314 LabApp] dockerfile-language-server-nodejs/lib/server.js not found in node_modules of [PosixPath('/home/jovyan/.jupyter'), PosixPath('/opt/conda/share/jupyter/lab/staging'), PosixPath('/opt/conda/lib'), PosixPath('/opt/conda')]
[D 19:50:20.314 LabApp] Checking for /home/jovyan/.jupyter/node_modules/javascript-typescript-langserver/lib/language-server-stdio.js
[D 19:50:20.314 LabApp] Checking for /opt/conda/share/jupyter/lab/staging/node_modules/javascript-typescript-langserver/lib/language-server-stdio.js
[D 19:50:20.314 LabApp] Checking for /opt/conda/lib/node_modules/javascript-typescript-langserver/lib/language-server-stdio.js
[D 19:50:20.315 LabApp] Checking for /opt/conda/node_modules/javascript-typescript-langserver/lib/language-server-stdio.js
[D 19:50:20.315 LabApp] javascript-typescript-langserver/lib/language-server-stdio.js not found in node_modules of [PosixPath('/home/jovyan/.jupyter'), PosixPath('/opt/conda/share/jupyter/lab/staging'), PosixPath('/opt/conda/lib'), PosixPath('/opt/conda')]
[D 19:50:20.318 LabApp] Checking for /home/jovyan/.jupyter/node_modules/unified-language-server/src/server.js
[D 19:50:20.318 LabApp] Checking for /opt/conda/share/jupyter/lab/staging/node_modules/unified-language-server/src/server.js
[D 19:50:20.319 LabApp] Checking for /opt/conda/lib/node_modules/unified-language-server/src/server.js
[D 19:50:20.319 LabApp] Checking for /opt/conda/node_modules/unified-language-server/src/server.js
[D 19:50:20.319 LabApp] unified-language-server/src/server.js not found in node_modules of [PosixPath('/home/jovyan/.jupyter'), PosixPath('/opt/conda/share/jupyter/lab/staging'), PosixPath('/opt/conda/lib'), PosixPath('/opt/conda')]
[D 19:50:20.319 LabApp] Checking for /home/jovyan/.jupyter/node_modules/vscode-css-languageserver-bin/cssServerMain.js
[D 19:50:20.319 LabApp] Checking for /opt/conda/share/jupyter/lab/staging/node_modules/vscode-css-languageserver-bin/cssServerMain.js
[D 19:50:20.320 LabApp] Checking for /opt/conda/lib/node_modules/vscode-css-languageserver-bin/cssServerMain.js
[D 19:50:20.320 LabApp] Checking for /opt/conda/node_modules/vscode-css-languageserver-bin/cssServerMain.js
[D 19:50:20.320 LabApp] vscode-css-languageserver-bin/cssServerMain.js not found in node_modules of [PosixPath('/home/jovyan/.jupyter'), PosixPath('/opt/conda/share/jupyter/lab/staging'), PosixPath('/opt/conda/lib'), PosixPath('/opt/conda')]
[D 19:50:20.320 LabApp] Checking for /home/jovyan/.jupyter/node_modules/vscode-html-languageserver-bin/htmlServerMain.js
[D 19:50:20.320 LabApp] Checking for /opt/conda/share/jupyter/lab/staging/node_modules/vscode-html-languageserver-bin/htmlServerMain.js
[D 19:50:20.320 LabApp] Checking for /opt/conda/lib/node_modules/vscode-html-languageserver-bin/htmlServerMain.js
[D 19:50:20.321 LabApp] Checking for /opt/conda/node_modules/vscode-html-languageserver-bin/htmlServerMain.js
[D 19:50:20.321 LabApp] vscode-html-languageserver-bin/htmlServerMain.js not found in node_modules of [PosixPath('/home/jovyan/.jupyter'), PosixPath('/opt/conda/share/jupyter/lab/staging'), PosixPath('/opt/conda/lib'), PosixPath('/opt/conda')]
[D 19:50:20.321 LabApp] Checking for /home/jovyan/.jupyter/node_modules/vscode-json-languageserver-bin/jsonServerMain.js
[D 19:50:20.321 LabApp] Checking for /opt/conda/share/jupyter/lab/staging/node_modules/vscode-json-languageserver-bin/jsonServerMain.js
[D 19:50:20.321 LabApp] Checking for /opt/conda/lib/node_modules/vscode-json-languageserver-bin/jsonServerMain.js
[D 19:50:20.321 LabApp] Checking for /opt/conda/node_modules/vscode-json-languageserver-bin/jsonServerMain.js
[D 19:50:20.322 LabApp] vscode-json-languageserver-bin/jsonServerMain.js not found in node_modules of [PosixPath('/home/jovyan/.jupyter'), PosixPath('/opt/conda/share/jupyter/lab/staging'), PosixPath('/opt/conda/lib'), PosixPath('/opt/conda')]
[D 19:50:20.322 LabApp] Checking for /home/jovyan/.jupyter/node_modules/yaml-language-server/bin/yaml-language-server
[D 19:50:20.322 LabApp] Checking for /opt/conda/share/jupyter/lab/staging/node_modules/yaml-language-server/bin/yaml-language-server
[D 19:50:20.322 LabApp] Checking for /opt/conda/lib/node_modules/yaml-language-server/bin/yaml-language-server
[D 19:50:20.322 LabApp] Checking for /opt/conda/node_modules/yaml-language-server/bin/yaml-language-server
[D 19:50:20.323 LabApp] yaml-language-server/bin/yaml-language-server not found in node_modules of [PosixPath('/home/jovyan/.jupyter'), PosixPath('/opt/conda/share/jupyter/lab/staging'), PosixPath('/opt/conda/lib'), PosixPath('/opt/conda')]
[D 19:50:20.440 LabApp] [lsp] rootUri will be file:///home/jovyan/.jupyter
[D 19:50:20.440 LabApp] [lsp] virtualDocumentsUri will be file:///home/jovyan/.jupyter/.virtual_documents
[D 19:50:20.442 LabApp] [lsp] The following Language Servers will be available: {
      "pyls": {
        "argv": [
          "/opt/conda/bin/pyls"
        ],
        "config_schema": {
          "properties": {
            "pyls.configurationSources": {
              "default": [
                "pycodestyle"
              ],
              "description": "List of configuration sources to use.",
              "items": {
                "enum": [
                  "pycodestyle",
                  "pyflakes"
                ],
                "type": "string"
              },
              "type": "array",
              "uniqueItems": true
            },
            "pyls.executable": {
              "default": "pyls",
              "description": "Language server executable",
              "type": "string"
            },
            "pyls.plugins.jedi_completion.enabled": {
              "default": true,
              "description": "Enable or disable the plugin.",
              "type": "boolean"
            },
            "pyls.plugins.jedi_completion.include_params": {
              "default": true,
              "description": "Auto-completes methods and classes with tabstops for each parameter.",
              "type": "boolean"
            },
            "pyls.plugins.jedi_definition.enabled": {
              "default": true,
              "description": "Enable or disable the plugin.",
              "type": "boolean"
            },
            "pyls.plugins.jedi_definition.follow_builtin_imports": {
              "default": true,
              "description": "If follow_imports is True will decide if it follow builtin imports.",
              "type": "boolean"
            },
            "pyls.plugins.jedi_definition.follow_imports": {
              "default": true,
              "description": "The goto call will follow imports.",
              "type": "boolean"
            },
            "pyls.plugins.jedi_hover.enabled": {
              "default": true,
              "description": "Enable or disable the plugin.",
              "type": "boolean"
            },
            "pyls.plugins.jedi_references.enabled": {
              "default": true,
              "description": "Enable or disable the plugin.",
              "type": "boolean"
            },
            "pyls.plugins.jedi_signature_help.enabled": {
              "default": true,
              "description": "Enable or disable the plugin.",
              "type": "boolean"
            },
            "pyls.plugins.jedi_symbols.all_scopes": {
              "default": true,
              "description": "If True lists the names of all scopes instead of only the module namespace.",
              "type": "boolean"
            },
            "pyls.plugins.jedi_symbols.enabled": {
              "default": true,
              "description": "Enable or disable the plugin.",
              "type": "boolean"
            },
            "pyls.plugins.mccabe.enabled": {
              "default": true,
              "description": "Enable or disable the plugin.",
              "type": "boolean"
            },
            "pyls.plugins.mccabe.threshold": {
              "default": 15,
              "description": "The minimum threshold that triggers warnings about cyclomatic complexity.",
              "type": "number"
            },
            "pyls.plugins.preload.enabled": {
              "default": true,
              "description": "Enable or disable the plugin.",
              "type": "boolean"
            },
            "pyls.plugins.preload.modules": {
              "default": null,
              "description": "List of modules to import on startup",
              "items": {
                "type": "string"
              },
              "type": "array",
              "uniqueItems": true
            },
            "pyls.plugins.pycodestyle.enabled": {
              "default": true,
              "description": "Enable or disable the plugin.",
              "type": "boolean"
            },
            "pyls.plugins.pycodestyle.exclude": {
              "default": null,
              "description": "Exclude files or directories which match these patterns.",
              "items": {
                "type": "string"
              },
              "type": "array",
              "uniqueItems": true
            },
            "pyls.plugins.pycodestyle.filename": {
              "default": null,
              "description": "When parsing directories, only check filenames matching these patterns.",
              "items": {
                "type": "string"
              },
              "type": "array",
              "uniqueItems": true
            },
            "pyls.plugins.pycodestyle.hangClosing": {
              "default": null,
              "description": "Hang closing bracket instead of matching indentation of opening bracket's line.",
              "type": "boolean"
            },
            "pyls.plugins.pycodestyle.ignore": {
              "default": null,
              "description": "Ignore errors and warnings",
              "items": {
                "type": "string"
              },
              "type": "array",
              "uniqueItems": true
            },
            "pyls.plugins.pycodestyle.maxLineLength": {
              "default": null,
              "description": "Set maximum allowed line length.",
              "type": "number"
            },
            "pyls.plugins.pycodestyle.select": {
              "default": null,
              "description": "Select errors and warnings",
              "items": {
                "type": "string"
              },
              "type": "array",
              "uniqueItems": true
            },
            "pyls.plugins.pydocstyle.addIgnore": {
              "default": null,
              "description": "Ignore errors and warnings in addition to the specified convention.",
              "items": {
                "type": "string"
              },
              "type": "array",
              "uniqueItems": true
            },
            "pyls.plugins.pydocstyle.addSelect": {
              "default": null,
              "description": "Select errors and warnings in addition to the specified convention.",
              "items": {
                "type": "string"
              },
              "type": "array",
              "uniqueItems": true
            },
            "pyls.plugins.pydocstyle.convention": {
              "default": null,
              "description": "Choose the basic list of checked errors by specifying an existing convention.",
              "enum": [
                "pep257",
                "numpy"
              ],
              "type": "string"
            },
            "pyls.plugins.pydocstyle.enabled": {
              "default": false,
              "description": "Enable or disable the plugin.",
              "type": "boolean"
            },
            "pyls.plugins.pydocstyle.ignore": {
              "default": null,
              "description": "Ignore errors and warnings",
              "items": {
                "type": "string"
              },
              "type": "array",
              "uniqueItems": true
            },
            "pyls.plugins.pydocstyle.match": {
              "default": "(?!test_).*\\.py",
              "description": "Check only files that exactly match the given regular expression; default is to match files that don't start with 'test_' but end with '.py'.",
              "type": "string"
            },
            "pyls.plugins.pydocstyle.matchDir": {
              "default": "[^\\.].*",
              "description": "Search only dirs that exactly match the given regular expression; default is to match dirs which do not begin with a dot.",
              "type": "string"
            },
            "pyls.plugins.pydocstyle.select": {
              "default": null,
              "description": "Select errors and warnings",
              "items": {
                "type": "string"
              },
              "type": "array",
              "uniqueItems": true
            },
            "pyls.plugins.pyflakes.enabled": {
              "default": true,
              "description": "Enable or disable the plugin.",
              "type": "boolean"
            },
            "pyls.plugins.pylint.args": {
              "default": null,
              "description": "Arguments to pass to pylint.",
              "items": {
                "type": "string"
              },
              "type": "array",
              "uniqueItems": false
            },
            "pyls.plugins.pylint.enabled": {
              "default": true,
              "description": "Enable or disable the plugin.",
              "type": "boolean"
            },
            "pyls.plugins.rope_completion.enabled": {
              "default": true,
              "description": "Enable or disable the plugin.",
              "type": "boolean"
            },
            "pyls.plugins.yapf.enabled": {
              "default": true,
              "description": "Enable or disable the plugin.",
              "type": "boolean"
            },
            "pyls.rope.extensionModules": {
              "default": null,
              "description": "Builtin and c-extension modules that are allowed to be imported and inspected by rope.",
              "type": "string"
            },
            "pyls.rope.ropeFolder": {
              "default": null,
              "description": "The name of the folder in which rope stores project configurations and data.  Pass `null` for not using such a folder at all.",
              "items": {
                "type": "string"
              },
              "type": "array",
              "uniqueItems": true
            }
          },
          "title": "Python Language Server Configuration",
          "type": "object"
        },
        "display_name": "pyls",
        "env": {
          "PYTHONUNBUFFERED": "1"
        },
        "extend": [
          {
            "display_name": "pyls-mypy",
            "install": {
              "pip": "pip install pyls-mypy"
            }
          },
          {
            "display_name": "pyls-black",
            "install": {
              "pip": "pip install pyls-black"
            }
          },
          {
            "display_name": "pyls-isort",
            "install": {
              "pip": "pip install pyls-isort"
            }
          }
        ],
        "install": {
          "conda": "conda install -c conda-forge python-language-server",
          "pip": "pip install python-language-server[all]"
        },
        "languages": [
          "python"
        ],
        "mime_types": [
          "text/python",
          "text/x-ipython"
        ],
        "urls": {
          "home": "https://github.com/palantir/python-language-server",
          "issues": "https://github.com/palantir/python-language-server/issues"
        },
        "version": 2
      }
    }
[I 19:50:20.992 LabApp] JupyterLab extension loaded from /opt/conda/lib/python3.7/site-packages/jupyterlab
[I 19:50:20.992 LabApp] JupyterLab application directory is /opt/conda/share/jupyter/lab
[D 19:50:21.092 LabApp] Using default logger
[D 19:50:21.093 LabApp] Using default logger
[D 19:50:21.093 LabApp] Using default logger
[D 19:50:21.093 LabApp] Using default logger
[D 19:50:21.093 LabApp] Using default logger
[I 19:50:21.097 LabApp] Serving notebooks from local directory: /home/jovyan/.jupyter
[I 19:50:21.097 LabApp] The Jupyter Notebook is running at:
[I 19:50:21.097 LabApp] http://b832f09e7bfa:8889/?token=34c3ce50874939ad1fc2cc19e15f579329ddaf66dd9e0f90
[I 19:50:21.097 LabApp]  or http://127.0.0.1:8889/?token=34c3ce50874939ad1fc2cc19e15f579329ddaf66dd9e0f90
[I 19:50:21.097 LabApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 19:50:21.103 LabApp]

Browser Output

console.js:34 LSP:  Will invoke completer after .
completion.js:121 [LSP][Completer] Token: {offset: 2, value: ".", type: undefined}
completion.js:189 [LSP][Completer] Merging completions: {start: 3, end: 3, matches: Array(1126), metadata: {…}} {start: 0, end: 3, matches: Array(500), metadata: {…}}
completion.js:203 [LSP][Completer] Removing kernel prefix:  np.

No errors

Thanks for help!

Issue Analytics

State:
Created 3 years ago
Reactions:25
Comments:68 (35 by maintainers)

Top GitHub Comments

10reactions

krassowskicommented, Aug 2, 2021

python-lsp-server 1.2 is now available. I will close this issue for now as I believe it was solved - numerous performance improvements were added since it was created and most crucially the real culprit, this is very slow calls to jedi in the default pyls server has been eliminated. If you still struggle with performance please open a new issue with all the details needed to reproduce it.

For anyone reading this comment in future, please note that the fixes are available only in my personal pyls fork and in the community pylsp fork, but not in the original pyls which is no longer maintained (so you need python-lsp-server, not python-language-server); in short:

pip uninstall python-language-server
pip install -U jupyterlab jupyterlab-lsp nbclassic python-lsp-server

6reactions

krassowskicommented, Jul 14, 2021

Quick update: the two pull requests with major performance improvements to python-lsp-server were merged yesterday. With the default settings you should get a substantial speed up. You can try it out by installing directly from GitHub:

pip install -U jupyterlab jupyterlab-lsp nbclassic
pip uninstall python-language-server python-lsp-server
pip install git+https://github.com/python-lsp/python-lsp-server.git@develop

There were also some improvements for the rendering of icons in #625.