Dependency resolution is extremely slow

[alecandido]

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

Specs

• OS version and name:
  OS: Linux 5.13 Ubuntu 21.10 21.10 (Impish Indri)
  CPU: (12) x64 Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
• Poetry version: 1.1.12

pyproject.toml

[tool.poetry]
name = "package-name"
version = "0.1.0"
description = ""
authors = ["Your Name <you@example.com>"]

[tool.poetry.dependencies]
python = "^3.9"
numpy = "^1"

[tool.poetry.dev-dependencies]
pytest = "^5.2"
pdbpp = "^0.10.3"
black = "^21.9b0"
isort = "^5.9.3"
ipython = "^7.28.0"
pylint = "^2.11.1"

[build-system]
requires = ["poetry-core>=1.0.0"]
build-backend = "poetry.core.masonry.api"

Internet connection

Testing download speed................................................................................
Download: 906.41 Mbit/s
Testing upload speed......................................................................................................
Upload: 292.53 Mbit/s

Issue

Just running poetry update took 15 minutes to do exactly nothing:

Updating dependencies
Resolving dependencies... (922.3s)

Writing lock file

No dependencies to install or update

Even more, for other packages with a few more dependencies, I've seen poetry running for more than one hour without completing (I killed).

In general, this behavior happens for all the sub-commands that potentially have to resolve dependencies, including add, update, but even install.

[Zethson]

I'd assume that the issue is numpy here. Poetry has to check too many versions.

[alecandido]

Ok, I'm going to test, but for sure you have a point.

I'm not sure if I can pin the exact numpy version, since in a non-minimal example it's also a dependency of other dependencies...

[alecandido]

Nope, even without numpy is taking long.

Moreover, using -vvv and watching the logs (meaning me watching the terminal), at some points it's completely stuck:

Logs up to stack (same pyproject.toml without numpy)

❯ time poetry install -vvv 
Updating dependencies
Resolving dependencies...
   1: fact: proj is 0.1.0
   1: derived: proj
   1: fact: proj depends on pytest (^5.2)
   1: fact: proj depends on pdbpp (^0.10.3)
   1: fact: proj depends on black (^21.9b0)
   1: fact: proj depends on isort (^5.9.3)
   1: fact: proj depends on ipython (^7.28.0)
   1: fact: proj depends on pylint (^2.11.1)
   1: fact: proj depends on pytest (^5.2)
   1: fact: proj depends on pdbpp (^0.10.3)
   1: fact: proj depends on black (^21.9b0)
   1: fact: proj depends on isort (^5.9.3)
   1: fact: proj depends on ipython (^7.28.0)
   1: fact: proj depends on pylint (^2.11.1)
   1: selecting proj (0.1.0)
   1: derived: pylint (>=2.11.1,<3.0.0)
   1: derived: ipython (>=7.28.0,<8.0.0)
   1: derived: isort (>=5.9.3,<6.0.0)
   1: derived: black (>=21.9b0,<22.0)
   1: derived: pdbpp (>=0.10.3,<0.11.0)
   1: derived: pytest (>=5.2,<6.0)
   1: fact: pdbpp (0.10.3) depends on fancycompleter (>=0.8)
   1: fact: pdbpp (0.10.3) depends on wmctrl (*)
   1: fact: pdbpp (0.10.3) depends on pygments (*)
   1: selecting pdbpp (0.10.3)
   1: derived: pygments
   1: derived: wmctrl
   1: derived: fancycompleter (>=0.8)
   1: selecting isort (5.10.1)
   1: fact: fancycompleter (0.9.1) depends on pyrepl (>=0.8.2)
   1: fact: fancycompleter (0.9.1) depends on pyreadline (*)
   1: selecting fancycompleter (0.9.1)
   1: derived: pyreadline
   1: derived: pyrepl (>=0.8.2)
   1: selecting pyrepl (0.9.0)
   1: fact: pylint (2.12.2) depends on platformdirs (>=2.2.0)
   1: fact: pylint (2.12.2) depends on astroid (>=2.9.0,<2.10)
   1: fact: pylint (2.12.2) depends on isort (>=4.2.5,<6)
   1: fact: pylint (2.12.2) depends on mccabe (>=0.6,<0.7)
   1: fact: pylint (2.12.2) depends on toml (>=0.9.2)
   1: fact: pylint (2.12.2) depends on typing-extensions (>=3.10.0)
   1: fact: pylint (2.12.2) depends on colorama (*)
   1: selecting pylint (2.12.2)
   1: derived: colorama
   1: derived: typing-extensions (>=3.10.0)
   1: derived: toml (>=0.9.2)
   1: derived: mccabe (>=0.6,<0.7)
   1: derived: astroid (>=2.9.0,<2.10)
   1: derived: platformdirs (>=2.2.0)

Next batch, before stuck again

   1: fact: ipython (7.30.1) depends on jedi (>=0.16)
   1: fact: ipython (7.30.1) depends on decorator (*)
   1: fact: ipython (7.30.1) depends on pickleshare (*)
   1: fact: ipython (7.30.1) depends on traitlets (>=4.2)
   1: fact: ipython (7.30.1) depends on prompt-toolkit (>=2.0.0,<3.0.0 || >3.0.0,<3.0.1 || >3.0.1,<3.1.0)
   1: fact: ipython (7.30.1) depends on pygments (*)
   1: fact: ipython (7.30.1) depends on backcall (*)
   1: fact: ipython (7.30.1) depends on matplotlib-inline (*)
   1: fact: ipython (7.30.1) depends on pexpect (>4.3)
   1: fact: ipython (7.30.1) depends on appnope (*)
   1: fact: ipython (7.30.1) depends on colorama (*)
   1: selecting ipython (7.30.1)
   1: derived: appnope
   1: derived: pexpect (>4.3)
   1: derived: matplotlib-inline
   1: derived: backcall
   1: derived: prompt-toolkit (>=2.0.0,!=3.0.0,!=3.0.1,<3.1.0)
   1: derived: traitlets (>=4.2)
   1: derived: pickleshare
   1: derived: decorator
   1: derived: jedi (>=0.16)

Network plot by btop (gracefully distorted by GitHub mono font...)

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[alecandido]

More updates:

• on the opposite of what someone guessed on Discord, I don't believe it's a lockfile problem, a new project with same dependencies resolves much faster (i.e. without lockfile) once the first one has been resolved
• I guess than is somehow related to network fetching and cache
• interestingly enough, sometimes if I kill the process and rerun, it advances a bit more; some other times instead, it blocks at a point where it was already stuck before, but that has been already passed in a former instance...

[item4]

Same issue for me

base pyproject.toml content

[tool.poetry]
name = "project"
version = "0.1.0"
description = ""
authors = ["name <email@email.com>"]

[tool.poetry.dependencies]
python = "^3.10"
httpx = "^0.21.1"
lxml = "^4.7.1"
cssselect = "^1.1.0"
attrs = "^21.2.0"
more-itertools = "^8.12.0"
Pillow = "^8.4.0"

[tool.poetry.dev-dependencies]

[build-system]
requires = ["poetry-core>=1.0.0"]
build-backend = "poetry.core.masonry.api"

shell works

$ poetry --version
Poetry (version 1.2.0a2)
$ rm poetry.lock
$ poetry install                                                
Updating dependencies
Resolving dependencies... (537.4s)

Writing lock file

Package operations: 14 installs, 0 updates, 0 removals

  • Installing idna (3.3)
  • Installing sniffio (1.2.0): Pending...

Hanging there and no more installation.

generated poetry.lock content

[[package]]
name = "anyio"
version = "3.4.0"
description = "High level compatibility layer for multiple asynchronous event loop implementations"
category = "main"
optional = false
python-versions = ">=3.6.2"

[package.dependencies]
idna = ">=2.8"
sniffio = ">=1.1"

[package.extras]
doc = ["sphinx-rtd-theme", "sphinx-autodoc-typehints (>=1.2.0)"]
test = ["coverage[toml] (>=4.5)", "hypothesis (>=4.0)", "pytest (>=6.0)", "pytest-mock (>=3.6.1)", "trustme", "contextlib2", "uvloop (<0.15)", "mock (>=4)", "uvloop (>=0.15)"]
trio = ["trio (>=0.16)"]

[[package]]
name = "attrs"
version = "21.2.0"
description = "Classes Without Boilerplate"
category = "main"
optional = false
python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"

[package.extras]
dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface", "furo", "sphinx", "sphinx-notfound-page", "pre-commit"]
docs = ["furo", "sphinx", "zope.interface", "sphinx-notfound-page"]
tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface"]
tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins"]

[[package]]
name = "certifi"
version = "2021.10.8"
description = "Python package for providing Mozilla's CA Bundle."
category = "main"
optional = false
python-versions = "*"

[[package]]
name = "charset-normalizer"
version = "2.0.9"
description = "The Real First Universal Charset Detector. Open, modern and actively maintained alternative to Chardet."
category = "main"
optional = false
python-versions = ">=3.5.0"

[package.extras]
unicode_backport = ["unicodedata2"]

[[package]]
name = "cssselect"
version = "1.1.0"
description = "cssselect parses CSS3 Selectors and translates them to XPath 1.0"
category = "main"
optional = false
python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"

[[package]]
name = "h11"
version = "0.12.0"
description = "A pure-Python, bring-your-own-I/O implementation of HTTP/1.1"
category = "main"
optional = false
python-versions = ">=3.6"

[[package]]
name = "httpcore"
version = "0.14.3"
description = "A minimal low-level HTTP client."
category = "main"
optional = false
python-versions = ">=3.6"

[package.dependencies]
anyio = ">=3.0.0,<4.0.0"
certifi = "*"
h11 = ">=0.11,<0.13"
sniffio = ">=1.0.0,<2.0.0"

[package.extras]
http2 = ["h2 (>=3,<5)"]

[[package]]
name = "httpx"
version = "0.21.1"
description = "The next generation HTTP client."
category = "main"
optional = false
python-versions = ">=3.6"

[package.dependencies]
certifi = "*"
charset-normalizer = "*"
httpcore = ">=0.14.0,<0.15.0"
rfc3986 = {version = ">=1.3,<2", extras = ["idna2008"]}
sniffio = "*"

[package.extras]
brotli = ["brotlicffi", "brotli"]
cli = ["click (>=8.0.0,<9.0.0)", "rich (>=10.0.0,<11.0.0)", "pygments (>=2.0.0,<3.0.0)"]
http2 = ["h2 (>=3,<5)"]

[[package]]
name = "idna"
version = "3.3"
description = "Internationalized Domain Names in Applications (IDNA)"
category = "main"
optional = false
python-versions = ">=3.5"

[[package]]
name = "lxml"
version = "4.7.1"
description = "Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API."
category = "main"
optional = false
python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, != 3.4.*"

[package.extras]
cssselect = ["cssselect (>=0.7)"]
html5 = ["html5lib"]
htmlsoup = ["beautifulsoup4"]
source = ["Cython (>=0.29.7)"]

[[package]]
name = "more-itertools"
version = "8.12.0"
description = "More routines for operating on iterables, beyond itertools"
category = "main"
optional = false
python-versions = ">=3.5"

[[package]]
name = "pillow"
version = "8.4.0"
description = "Python Imaging Library (Fork)"
category = "main"
optional = false
python-versions = ">=3.6"

[[package]]
name = "rfc3986"
version = "1.5.0"
description = "Validating URI References per RFC 3986"
category = "main"
optional = false
python-versions = "*"

[package.dependencies]
idna = {version = "*", optional = true, markers = "extra == \"idna2008\""}

[package.extras]
idna2008 = ["idna"]

[[package]]
name = "sniffio"
version = "1.2.0"
description = "Sniff out which async library your code is running under"
category = "main"
optional = false
python-versions = ">=3.5"

[metadata]
lock-version = "1.1"
python-versions = "^3.10"
content-hash = "e06d3b1d7b927edbc9dd0897734decbfbe56bddba7dd7ee5010032fd5acde810"

[metadata.files]
anyio = [
    {file = "anyio-3.4.0-py3-none-any.whl", hash = "sha256:2855a9423524abcdd652d942f8932fda1735210f77a6b392eafd9ff34d3fe020"},
    {file = "anyio-3.4.0.tar.gz", hash = "sha256:24adc69309fb5779bc1e06158e143e0b6d2c56b302a3ac3de3083c705a6ed39d"},
]
attrs = [
    {file = "attrs-21.2.0-py2.py3-none-any.whl", hash = "sha256:149e90d6d8ac20db7a955ad60cf0e6881a3f20d37096140088356da6c716b0b1"},
    {file = "attrs-21.2.0.tar.gz", hash = "sha256:ef6aaac3ca6cd92904cdd0d83f629a15f18053ec84e6432106f7a4d04ae4f5fb"},
]
certifi = [
    {file = "certifi-2021.10.8-py2.py3-none-any.whl", hash = "sha256:d62a0163eb4c2344ac042ab2bdf75399a71a2d8c7d47eac2e2ee91b9d6339569"},
    {file = "certifi-2021.10.8.tar.gz", hash = "sha256:78884e7c1d4b00ce3cea67b44566851c4343c120abd683433ce934a68ea58872"},
]
charset-normalizer = [
    {file = "charset-normalizer-2.0.9.tar.gz", hash = "sha256:b0b883e8e874edfdece9c28f314e3dd5badf067342e42fb162203335ae61aa2c"},
    {file = "charset_normalizer-2.0.9-py3-none-any.whl", hash = "sha256:1eecaa09422db5be9e29d7fc65664e6c33bd06f9ced7838578ba40d58bdf3721"},
]
cssselect = [
    {file = "cssselect-1.1.0-py2.py3-none-any.whl", hash = "sha256:f612ee47b749c877ebae5bb77035d8f4202c6ad0f0fc1271b3c18ad6c4468ecf"},
    {file = "cssselect-1.1.0.tar.gz", hash = "sha256:f95f8dedd925fd8f54edb3d2dfb44c190d9d18512377d3c1e2388d16126879bc"},
]
h11 = [
    {file = "h11-0.12.0-py3-none-any.whl", hash = "sha256:36a3cb8c0a032f56e2da7084577878a035d3b61d104230d4bd49c0c6b555a9c6"},
    {file = "h11-0.12.0.tar.gz", hash = "sha256:47222cb6067e4a307d535814917cd98fd0a57b6788ce715755fa2b6c28b56042"},
]
httpcore = [
    {file = "httpcore-0.14.3-py3-none-any.whl", hash = "sha256:9a98d2416b78976fc5396ff1f6b26ae9885efbb3105d24eed490f20ab4c95ec1"},
    {file = "httpcore-0.14.3.tar.gz", hash = "sha256:d10162a63265a0228d5807964bd964478cbdb5178f9a2eedfebb2faba27eef5d"},
]
httpx = [
    {file = "httpx-0.21.1-py3-none-any.whl", hash = "sha256:208e5ef2ad4d105213463cfd541898ed9d11851b346473539a8425e644bb7c66"},
    {file = "httpx-0.21.1.tar.gz", hash = "sha256:02af20df486b78892a614a7ccd4e4e86a5409ec4981ab0e422c579a887acad83"},
]
idna = [
    {file = "idna-3.3-py3-none-any.whl", hash = "sha256:84d9dd047ffa80596e0f246e2eab0b391788b0503584e8945f2368256d2735ff"},
    {file = "idna-3.3.tar.gz", hash = "sha256:9d643ff0a55b762d5cdb124b8eaa99c66322e2157b69160bc32796e824360e6d"},
]
lxml = [
    {file = "lxml-4.7.1-cp27-cp27m-macosx_10_14_x86_64.whl", hash = "sha256:d546431636edb1d6a608b348dd58cc9841b81f4116745857b6cb9f8dadb2725f"},
    {file = "lxml-4.7.1-cp27-cp27m-manylinux_2_5_i686.manylinux1_i686.whl", hash = "sha256:6308062534323f0d3edb4e702a0e26a76ca9e0e23ff99be5d82750772df32a9e"},
    {file = "lxml-4.7.1-cp27-cp27m-manylinux_2_5_x86_64.manylinux1_x86_64.whl", hash = "sha256:f76dbe44e31abf516114f6347a46fa4e7c2e8bceaa4b6f7ee3a0a03c8eba3c17"},
    {file = "lxml-4.7.1-cp27-cp27m-win32.whl", hash = "sha256:d5618d49de6ba63fe4510bdada62d06a8acfca0b4b5c904956c777d28382b419"},
    {file = "lxml-4.7.1-cp27-cp27m-win_amd64.whl", hash = "sha256:9393a05b126a7e187f3e38758255e0edf948a65b22c377414002d488221fdaa2"},
    {file = "lxml-4.7.1-cp27-cp27mu-manylinux_2_5_i686.manylinux1_i686.whl", hash = "sha256:50d3dba341f1e583265c1a808e897b4159208d814ab07530202b6036a4d86da5"},
    {file = "lxml-4.7.1-cp27-cp27mu-manylinux_2_5_x86_64.manylinux1_x86_64.whl", hash = "sha256:44f552e0da3c8ee3c28e2eb82b0b784200631687fc6a71277ea8ab0828780e7d"},
    {file = "lxml-4.7.1-cp310-cp310-macosx_10_14_x86_64.whl", hash = "sha256:e662c6266e3a275bdcb6bb049edc7cd77d0b0f7e119a53101d367c841afc66dc"},
    {file = "lxml-4.7.1-cp310-cp310-manylinux_2_12_i686.manylinux2010_i686.manylinux_2_24_i686.whl", hash = "sha256:4c093c571bc3da9ebcd484e001ba18b8452903cd428c0bc926d9b0141bcb710e"},
    {file = "lxml-4.7.1-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.manylinux_2_24_aarch64.whl", hash = "sha256:3e26ad9bc48d610bf6cc76c506b9e5ad9360ed7a945d9be3b5b2c8535a0145e3"},
    {file = "lxml-4.7.1-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.manylinux_2_24_x86_64.whl", hash = "sha256:a5f623aeaa24f71fce3177d7fee875371345eb9102b355b882243e33e04b7175"},
    {file = "lxml-4.7.1-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:7b5e2acefd33c259c4a2e157119c4373c8773cf6793e225006a1649672ab47a6"},
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sniffio = [
    {file = "sniffio-1.2.0-py3-none-any.whl", hash = "sha256:471b71698eac1c2112a40ce2752bb2f4a4814c22a54a3eed3676bc0f5ca9f663"},
    {file = "sniffio-1.2.0.tar.gz", hash = "sha256:c4666eecec1d3f50960c6bdf61ab7bc350648da6c126e3cf6898d8cd4ddcd3de"},
]

workaround

[tool.poetry.dependencies]
python = "^3.10"
httpx = "^0.21.1"
lxml = "^4.7.1"
cssselect = "^1.1.0"
attrs = "^21.2.0"
more-itertools = "^8.12.0"
Pillow = "^8.4.0"
# workarounds
anyio = "^3.4.0"  # httpcore
certifi = "^2021.10.8"  # httpx, httpcore
charset-normalizer = "^2.0.9"  # httpx
h11 = "^0.12.0"  # httpcore
httpcore = "^0.14.3"  # httpx
idna = "^3.3"  # anyio, rfc3986
rfc3986 = "^1.5.0"  # httpx
sniffio = "^1.2.0"  # httpx, httpcore, anyio

$ rm poetry.lock
$ poetry install
Updating dependencies
Resolving dependencies... (0.2s)

Writing lock file

[jimmywan]

Just tried this myself using 1.1.11 on @item4's pyproject.toml from above:

> poetry lock -vvv
...
1: Version solving took 10.174 seconds.
   1: Tried 1 solutions.

Dunno if it matters, but I have this in my env:
POETRY_VIRTUALENVS_CREATE=false

Just noticed you had 1.1.12, so I updated and retried:

> poetry self update 1.1.12
> rm poetry.lock
> poetry lock -vv
   1: Version solving took 0.146 seconds.
   1: Tried 1 solutions.

[alecandido]

@jimmywan please, show even the pyproject.toml (or specify it is the same of mine).

Also, try to rerun after issuing

poetry cache clear pypi --all

to see the difference with and without cache.

[jimmywan]

@jimmywan please, show even the pyproject.toml (or specify it is the same of mine).

I've updated my comment above to reflect the fact that I ran that test using @item4 's pyproject.toml.
Apologies for any confusion.

Also, try to rerun ... to see the difference with and without cache.

Below I reran this on a cleared cache using your pyproject.toml. Finished in ~90s.
This was on MacOS over a semi-standard residential broadband connection shared with other WFH adults:

20.6.0 Darwin Kernel Version 20.6.0: Wed Jun 23 00:26:31 PDT 2021
via SpeedTest.NET:
DOWNLOAD Mbps: 229.26
UPLOAD Mbps: 10.97

❯ poetry cache clear pypi --all
Delete 881 entries? (yes/no) [no] yes
> poetry lock -vv
...
   0: Duplicate dependencies for typing-extensions
   0: Different requirements found for typing-extensions (>=3.10.0.0) with markers * and typing-extensions (!=3.10.0.1) with markers python_version >= "3.10".
   1: Version solving took 17.517 seconds.
   1: Tried 1 solutions.
   0: Retrying dependency resolution with the following overrides ({Package('black', '21.12b0'): {'typing-extensions': <Dependency typing-extensions (>=3.10.0.0)>}}).
...
   1: Version solving took 66.233 seconds.
   1: Tried 1 solutions.
   0: Retrying dependency resolution with the following overrides ({Package('black', '21.12b0'): {'typing-extensions': <Dependency typing-extensions (!=3.10.0.1)>}}).
...
   1: Version solving took 0.253 seconds.
   1: Tried 1 solutions.
   0: Complete version solving took 84.019 seconds with 2 overrides

Summary

❯ poetry cache clear pypi --all
Delete 206 entries? (yes/no) [no] yes
❯ poetry lock -vv
Using virtualenv: /Users/jimmy.wan/.pyenv/versions/miniconda3-latest/envs/gecko
Updating dependencies
Resolving dependencies...
   1: fact: package-name is 0.1.0
   1: derived: package-name
   1: fact: package-name depends on numpy (^1)
   1: fact: package-name depends on pytest (^5.2)
   1: fact: package-name depends on pdbpp (^0.10.3)
   1: fact: package-name depends on black (^21.9b0)
   1: fact: package-name depends on isort (^5.9.3)
   1: fact: package-name depends on ipython (^7.28.0)
   1: fact: package-name depends on pylint (^2.11.1)
   1: fact: package-name depends on pytest (^5.2)
   1: fact: package-name depends on pdbpp (^0.10.3)
   1: fact: package-name depends on black (^21.9b0)
   1: fact: package-name depends on isort (^5.9.3)
   1: fact: package-name depends on ipython (^7.28.0)
   1: fact: package-name depends on pylint (^2.11.1)
   1: selecting package-name (0.1.0)
   1: derived: pylint (>=2.11.1,<3.0.0)
   1: derived: ipython (>=7.28.0,<8.0.0)
   1: derived: isort (>=5.9.3,<6.0.0)
   1: derived: black (>=21.9b0,<22.0)
   1: derived: pdbpp (>=0.10.3,<0.11.0)
   1: derived: pytest (>=5.2,<6.0)
   1: derived: numpy (>=1,<2)
   1: fact: pdbpp (0.10.3) depends on fancycompleter (>=0.8)
   1: fact: pdbpp (0.10.3) depends on wmctrl (*)
   1: fact: pdbpp (0.10.3) depends on pygments (*)
   1: selecting pdbpp (0.10.3)
   1: derived: pygments
   1: derived: wmctrl
   1: derived: fancycompleter (>=0.8)
   1: selecting isort (5.10.1)
   1: fact: fancycompleter (0.9.1) depends on pyrepl (>=0.8.2)
   1: fact: fancycompleter (0.9.1) depends on pyreadline (*)
   1: selecting fancycompleter (0.9.1)
   1: derived: pyreadline
   1: derived: pyrepl (>=0.8.2)
   1: selecting pyrepl (0.9.0)
   1: fact: pylint (2.12.2) depends on platformdirs (>=2.2.0)
   1: fact: pylint (2.12.2) depends on astroid (>=2.9.0,<2.10)
   1: fact: pylint (2.12.2) depends on isort (>=4.2.5,<6)
   1: fact: pylint (2.12.2) depends on mccabe (>=0.6,<0.7)
   1: fact: pylint (2.12.2) depends on toml (>=0.9.2)
   1: fact: pylint (2.12.2) depends on typing-extensions (>=3.10.0)
   1: fact: pylint (2.12.2) depends on colorama (*)
   1: selecting pylint (2.12.2)
   1: derived: colorama
   1: derived: typing-extensions (>=3.10.0)
   1: derived: toml (>=0.9.2)
   1: derived: mccabe (>=0.6,<0.7)
   1: derived: astroid (>=2.9.0,<2.10)
   1: derived: platformdirs (>=2.2.0)
   1: fact: astroid (2.9.0) depends on lazy-object-proxy (>=1.4.0)
   1: fact: astroid (2.9.0) depends on wrapt (>=1.11,<1.14)
   1: fact: astroid (2.9.0) depends on typing-extensions (>=3.10)
   1: selecting astroid (2.9.0)
   1: derived: wrapt (>=1.11,<1.14)
   1: derived: lazy-object-proxy (>=1.4.0)
   1: selecting mccabe (0.6.1)
   1: fact: ipython (7.30.1) depends on jedi (>=0.16)
   1: fact: ipython (7.30.1) depends on decorator (*)
   1: fact: ipython (7.30.1) depends on pickleshare (*)
   1: fact: ipython (7.30.1) depends on traitlets (>=4.2)
   1: fact: ipython (7.30.1) depends on prompt-toolkit (>=2.0.0,<3.0.0 || >3.0.0,<3.0.1 || >3.0.1,<3.1.0)
   1: fact: ipython (7.30.1) depends on pygments (*)
   1: fact: ipython (7.30.1) depends on backcall (*)
   1: fact: ipython (7.30.1) depends on matplotlib-inline (*)
   1: fact: ipython (7.30.1) depends on pexpect (>4.3)
   1: fact: ipython (7.30.1) depends on appnope (*)
   1: fact: ipython (7.30.1) depends on colorama (*)
   1: selecting ipython (7.30.1)
   1: derived: appnope
   1: derived: pexpect (>4.3)
   1: derived: matplotlib-inline
   1: derived: backcall
   1: derived: prompt-toolkit (>=2.0.0,!=3.0.0,!=3.0.1,<3.1.0)
   1: derived: traitlets (>=4.2)
   1: derived: pickleshare
   1: derived: decorator
   1: derived: jedi (>=0.16)
   1: selecting backcall (0.2.0)
   1: selecting wmctrl (0.4)
   1: selecting platformdirs (2.4.1)
   1: fact: matplotlib-inline (0.1.3) depends on traitlets (*)
   1: selecting matplotlib-inline (0.1.3)
   0: Duplicate dependencies for typing-extensions
   0: Different requirements found for typing-extensions (>=3.10.0.0) with markers * and typing-extensions (!=3.10.0.1) with markers python_version >= "3.10".
   1: Version solving took 17.517 seconds.
   1: Tried 1 solutions.
   0: Retrying dependency resolution with the following overrides ({Package('black', '21.12b0'): {'typing-extensions': <Dependency typing-extensions (>=3.10.0.0)>}}).
   1: fact: package-name is 0.1.0
   1: derived: package-name
   1: fact: package-name depends on numpy (^1)
   1: fact: package-name depends on pytest (^5.2)
   1: fact: package-name depends on pdbpp (^0.10.3)
   1: fact: package-name depends on black (^21.9b0)
   1: fact: package-name depends on isort (^5.9.3)
   1: fact: package-name depends on ipython (^7.28.0)
   1: fact: package-name depends on pylint (^2.11.1)
   1: fact: package-name depends on pytest (^5.2)
   1: fact: package-name depends on pdbpp (^0.10.3)
   1: fact: package-name depends on black (^21.9b0)
   1: fact: package-name depends on isort (^5.9.3)
   1: fact: package-name depends on ipython (^7.28.0)
   1: fact: package-name depends on pylint (^2.11.1)
   1: selecting package-name (0.1.0)
   1: derived: pylint (>=2.11.1,<3.0.0)
   1: derived: ipython (>=7.28.0,<8.0.0)
   1: derived: isort (>=5.9.3,<6.0.0)
   1: derived: black (>=21.9b0,<22.0)
   1: derived: pdbpp (>=0.10.3,<0.11.0)
   1: derived: pytest (>=5.2,<6.0)
   1: derived: numpy (>=1,<2)
   1: fact: pdbpp (0.10.3) depends on fancycompleter (>=0.8)
   1: fact: pdbpp (0.10.3) depends on wmctrl (*)
   1: fact: pdbpp (0.10.3) depends on pygments (*)
   1: selecting pdbpp (0.10.3)
   1: derived: pygments
   1: derived: wmctrl
   1: derived: fancycompleter (>=0.8)
   1: selecting isort (5.10.1)
   1: fact: fancycompleter (0.9.1) depends on pyrepl (>=0.8.2)
   1: fact: fancycompleter (0.9.1) depends on pyreadline (*)
   1: selecting fancycompleter (0.9.1)
   1: derived: pyreadline
   1: derived: pyrepl (>=0.8.2)
   1: selecting pyrepl (0.9.0)
   1: fact: pylint (2.12.2) depends on platformdirs (>=2.2.0)
   1: fact: pylint (2.12.2) depends on astroid (>=2.9.0,<2.10)
   1: fact: pylint (2.12.2) depends on isort (>=4.2.5,<6)
   1: fact: pylint (2.12.2) depends on mccabe (>=0.6,<0.7)
   1: fact: pylint (2.12.2) depends on toml (>=0.9.2)
   1: fact: pylint (2.12.2) depends on typing-extensions (>=3.10.0)
   1: fact: pylint (2.12.2) depends on colorama (*)
   1: selecting pylint (2.12.2)
   1: derived: colorama
   1: derived: typing-extensions (>=3.10.0)
   1: derived: toml (>=0.9.2)
   1: derived: mccabe (>=0.6,<0.7)
   1: derived: astroid (>=2.9.0,<2.10)
   1: derived: platformdirs (>=2.2.0)
   1: fact: astroid (2.9.0) depends on lazy-object-proxy (>=1.4.0)
   1: fact: astroid (2.9.0) depends on wrapt (>=1.11,<1.14)
   1: fact: astroid (2.9.0) depends on typing-extensions (>=3.10)
   1: selecting astroid (2.9.0)
   1: derived: wrapt (>=1.11,<1.14)
   1: derived: lazy-object-proxy (>=1.4.0)
   1: selecting mccabe (0.6.1)
   1: fact: ipython (7.30.1) depends on jedi (>=0.16)
   1: fact: ipython (7.30.1) depends on decorator (*)
   1: fact: ipython (7.30.1) depends on pickleshare (*)
   1: fact: ipython (7.30.1) depends on traitlets (>=4.2)
   1: fact: ipython (7.30.1) depends on prompt-toolkit (>=2.0.0,<3.0.0 || >3.0.0,<3.0.1 || >3.0.1,<3.1.0)
   1: fact: ipython (7.30.1) depends on pygments (*)
   1: fact: ipython (7.30.1) depends on backcall (*)
   1: fact: ipython (7.30.1) depends on matplotlib-inline (*)
   1: fact: ipython (7.30.1) depends on pexpect (>4.3)
   1: fact: ipython (7.30.1) depends on appnope (*)
   1: fact: ipython (7.30.1) depends on colorama (*)
   1: selecting ipython (7.30.1)
   1: derived: appnope
   1: derived: pexpect (>4.3)
   1: derived: matplotlib-inline
   1: derived: backcall
   1: derived: prompt-toolkit (>=2.0.0,!=3.0.0,!=3.0.1,<3.1.0)
   1: derived: traitlets (>=4.2)
   1: derived: pickleshare
   1: derived: decorator
   1: derived: jedi (>=0.16)
   1: selecting backcall (0.2.0)
   1: selecting wmctrl (0.4)
   1: selecting platformdirs (2.4.1)
   1: fact: matplotlib-inline (0.1.3) depends on traitlets (*)
   1: selecting matplotlib-inline (0.1.3)
   1: fact: black (21.12b0) depends on click (>=7.1.2)
   1: fact: black (21.12b0) depends on platformdirs (>=2)
   1: fact: black (21.12b0) depends on tomli (>=0.2.6,<2.0.0)
   1: fact: black (21.12b0) depends on pathspec (>=0.9.0,<1)
   1: fact: black (21.12b0) depends on typing-extensions (>=3.10.0.0)
   1: fact: black (21.12b0) depends on mypy-extensions (>=0.4.3)
   1: selecting black (21.12b0)
   1: derived: mypy-extensions (>=0.4.3)
   1: derived: pathspec (>=0.9.0,<1)
   1: derived: tomli (>=0.2.6,<2.0.0)
   1: derived: click (>=7.1.2)
   1: selecting mypy-extensions (0.4.3)
   1: selecting pathspec (0.9.0)
   1: fact: click (8.0.3) depends on colorama (*)
   1: selecting click (8.0.3)
   1: fact: jedi (0.18.1) depends on parso (>=0.8.0,<0.9.0)
   1: selecting jedi (0.18.1)
   1: derived: parso (>=0.8.0,<0.9.0)
   1: selecting parso (0.8.3)
   1: selecting toml (0.10.2)
   1: selecting wrapt (1.13.3)
   1: selecting lazy-object-proxy (1.7.1)
   1: selecting pickleshare (0.7.5)
   1: fact: pytest (5.4.3) depends on py (>=1.5.0)
   1: fact: pytest (5.4.3) depends on packaging (*)
   1: fact: pytest (5.4.3) depends on attrs (>=17.4.0)
   1: fact: pytest (5.4.3) depends on more-itertools (>=4.0.0)
   1: fact: pytest (5.4.3) depends on pluggy (>=0.12,<1.0)
   1: fact: pytest (5.4.3) depends on wcwidth (*)
   1: fact: pytest (5.4.3) depends on atomicwrites (>=1.0)
   1: fact: pytest (5.4.3) depends on colorama (*)
   1: selecting pytest (5.4.3)
   1: derived: atomicwrites (>=1.0)
   1: derived: wcwidth
   1: derived: pluggy (>=0.12,<1.0)
   1: derived: more-itertools (>=4.0.0)
   1: derived: attrs (>=17.4.0)
   1: derived: packaging
   1: derived: py (>=1.5.0)
   1: selecting pluggy (0.13.1)
   1: selecting attrs (21.3.0)
   1: selecting py (1.11.0)
   1: selecting traitlets (5.1.1)
   1: selecting tomli (1.2.3)
   1: selecting wcwidth (0.2.5)
   1: selecting more-itertools (8.12.0)
   1: fact: prompt-toolkit (3.0.24) depends on wcwidth (*)
   1: selecting prompt-toolkit (3.0.24)
   1: selecting decorator (5.1.0)
   1: fact: packaging (21.3) depends on pyparsing (>=2.0.2,<3.0.5 || >3.0.5)
   1: selecting packaging (21.3)
   1: derived: pyparsing (>=2.0.2,!=3.0.5)
   1: selecting pyparsing (3.0.6)
   1: selecting pygments (2.10.0)
   1: fact: numpy (1.21.5) requires Python >=3.7,<3.11
   1: derived: not numpy (==1.21.5)
   1: fact: numpy (1.21.4) requires Python >=3.7,<3.11
   1: derived: not numpy (==1.21.4)
   1: fact: numpy (1.21.3) requires Python >=3.7,<3.11
   1: derived: not numpy (==1.21.3)
   1: fact: numpy (1.21.2) requires Python >=3.7,<3.11
   1: derived: not numpy (==1.21.2)
   1: selecting numpy (1.21.1)
   1: selecting typing-extensions (4.0.1)
   1: fact: pexpect (4.8.0) depends on ptyprocess (>=0.5)
   1: selecting pexpect (4.8.0)
   1: derived: ptyprocess (>=0.5)
   1: selecting ptyprocess (0.7.0)
   1: selecting atomicwrites (1.4.0)
   1: selecting pyreadline (2.1)
   1: selecting appnope (0.1.2)
   1: selecting colorama (0.4.4)
   1: Version solving took 66.233 seconds.
   1: Tried 1 solutions.
   0: Retrying dependency resolution with the following overrides ({Package('black', '21.12b0'): {'typing-extensions': <Dependency typing-extensions (!=3.10.0.1)>}}).
   1: fact: package-name is 0.1.0
   1: derived: package-name
   1: fact: package-name depends on numpy (^1)
   1: fact: package-name depends on pytest (^5.2)
   1: fact: package-name depends on pdbpp (^0.10.3)
   1: fact: package-name depends on black (^21.9b0)
   1: fact: package-name depends on isort (^5.9.3)
   1: fact: package-name depends on ipython (^7.28.0)
   1: fact: package-name depends on pylint (^2.11.1)
   1: fact: package-name depends on pytest (^5.2)
   1: fact: package-name depends on pdbpp (^0.10.3)
   1: fact: package-name depends on black (^21.9b0)
   1: fact: package-name depends on isort (^5.9.3)
   1: fact: package-name depends on ipython (^7.28.0)
   1: fact: package-name depends on pylint (^2.11.1)
   1: selecting package-name (0.1.0)
   1: derived: pylint (>=2.11.1,<3.0.0)
   1: derived: ipython (>=7.28.0,<8.0.0)
   1: derived: isort (>=5.9.3,<6.0.0)
   1: derived: black (>=21.9b0,<22.0)
   1: derived: pdbpp (>=0.10.3,<0.11.0)
   1: derived: pytest (>=5.2,<6.0)
   1: derived: numpy (>=1,<2)
   1: fact: pdbpp (0.10.3) depends on fancycompleter (>=0.8)
   1: fact: pdbpp (0.10.3) depends on wmctrl (*)
   1: fact: pdbpp (0.10.3) depends on pygments (*)
   1: selecting pdbpp (0.10.3)
   1: derived: pygments
   1: derived: wmctrl
   1: derived: fancycompleter (>=0.8)
   1: selecting isort (5.10.1)
   1: fact: fancycompleter (0.9.1) depends on pyrepl (>=0.8.2)
   1: fact: fancycompleter (0.9.1) depends on pyreadline (*)
   1: selecting fancycompleter (0.9.1)
   1: derived: pyreadline
   1: derived: pyrepl (>=0.8.2)
   1: selecting pyrepl (0.9.0)
   1: fact: pylint (2.12.2) depends on platformdirs (>=2.2.0)
   1: fact: pylint (2.12.2) depends on astroid (>=2.9.0,<2.10)
   1: fact: pylint (2.12.2) depends on isort (>=4.2.5,<6)
   1: fact: pylint (2.12.2) depends on mccabe (>=0.6,<0.7)
   1: fact: pylint (2.12.2) depends on toml (>=0.9.2)
   1: fact: pylint (2.12.2) depends on typing-extensions (>=3.10.0)
   1: fact: pylint (2.12.2) depends on colorama (*)
   1: selecting pylint (2.12.2)
   1: derived: colorama
   1: derived: typing-extensions (>=3.10.0)
   1: derived: toml (>=0.9.2)
   1: derived: mccabe (>=0.6,<0.7)
   1: derived: astroid (>=2.9.0,<2.10)
   1: derived: platformdirs (>=2.2.0)
   1: fact: astroid (2.9.0) depends on lazy-object-proxy (>=1.4.0)
   1: fact: astroid (2.9.0) depends on wrapt (>=1.11,<1.14)
   1: fact: astroid (2.9.0) depends on typing-extensions (>=3.10)
   1: selecting astroid (2.9.0)
   1: derived: wrapt (>=1.11,<1.14)
   1: derived: lazy-object-proxy (>=1.4.0)
   1: selecting mccabe (0.6.1)
   1: fact: ipython (7.30.1) depends on jedi (>=0.16)
   1: fact: ipython (7.30.1) depends on decorator (*)
   1: fact: ipython (7.30.1) depends on pickleshare (*)
   1: fact: ipython (7.30.1) depends on traitlets (>=4.2)
   1: fact: ipython (7.30.1) depends on prompt-toolkit (>=2.0.0,<3.0.0 || >3.0.0,<3.0.1 || >3.0.1,<3.1.0)
   1: fact: ipython (7.30.1) depends on pygments (*)
   1: fact: ipython (7.30.1) depends on backcall (*)
   1: fact: ipython (7.30.1) depends on matplotlib-inline (*)
   1: fact: ipython (7.30.1) depends on pexpect (>4.3)
   1: fact: ipython (7.30.1) depends on appnope (*)
   1: fact: ipython (7.30.1) depends on colorama (*)
   1: selecting ipython (7.30.1)
   1: derived: appnope
   1: derived: pexpect (>4.3)
   1: derived: matplotlib-inline
   1: derived: backcall
   1: derived: prompt-toolkit (>=2.0.0,!=3.0.0,!=3.0.1,<3.1.0)
   1: derived: traitlets (>=4.2)
   1: derived: pickleshare
   1: derived: decorator
   1: derived: jedi (>=0.16)
   1: selecting backcall (0.2.0)
   1: selecting wmctrl (0.4)
   1: selecting platformdirs (2.4.1)
   1: fact: matplotlib-inline (0.1.3) depends on traitlets (*)
   1: selecting matplotlib-inline (0.1.3)
   1: fact: black (21.12b0) depends on click (>=7.1.2)
   1: fact: black (21.12b0) depends on platformdirs (>=2)
   1: fact: black (21.12b0) depends on tomli (>=0.2.6,<2.0.0)
   1: fact: black (21.12b0) depends on pathspec (>=0.9.0,<1)
   1: fact: black (21.12b0) depends on typing-extensions (!=3.10.0.1)
   1: fact: black (21.12b0) depends on mypy-extensions (>=0.4.3)
   1: selecting black (21.12b0)
   1: derived: mypy-extensions (>=0.4.3)
   1: derived: typing-extensions (!=3.10.0.1)
   1: derived: pathspec (>=0.9.0,<1)
   1: derived: tomli (>=0.2.6,<2.0.0)
   1: derived: click (>=7.1.2)
   1: selecting mypy-extensions (0.4.3)
   1: selecting pathspec (0.9.0)
   1: fact: click (8.0.3) depends on colorama (*)
   1: selecting click (8.0.3)
   1: fact: jedi (0.18.1) depends on parso (>=0.8.0,<0.9.0)
   1: selecting jedi (0.18.1)
   1: derived: parso (>=0.8.0,<0.9.0)
   1: selecting parso (0.8.3)
   1: selecting toml (0.10.2)
   1: selecting wrapt (1.13.3)
   1: selecting lazy-object-proxy (1.7.1)
   1: selecting pickleshare (0.7.5)
   1: fact: pytest (5.4.3) depends on py (>=1.5.0)
   1: fact: pytest (5.4.3) depends on packaging (*)
   1: fact: pytest (5.4.3) depends on attrs (>=17.4.0)
   1: fact: pytest (5.4.3) depends on more-itertools (>=4.0.0)
   1: fact: pytest (5.4.3) depends on pluggy (>=0.12,<1.0)
   1: fact: pytest (5.4.3) depends on wcwidth (*)
   1: fact: pytest (5.4.3) depends on atomicwrites (>=1.0)
   1: fact: pytest (5.4.3) depends on colorama (*)
   1: selecting pytest (5.4.3)
   1: derived: atomicwrites (>=1.0)
   1: derived: wcwidth
   1: derived: pluggy (>=0.12,<1.0)
   1: derived: more-itertools (>=4.0.0)
   1: derived: attrs (>=17.4.0)
   1: derived: packaging
   1: derived: py (>=1.5.0)
   1: selecting pluggy (0.13.1)
   1: selecting attrs (21.3.0)
   1: selecting py (1.11.0)
   1: selecting traitlets (5.1.1)
   1: selecting tomli (1.2.3)
   1: selecting wcwidth (0.2.5)
   1: selecting more-itertools (8.12.0)
   1: fact: prompt-toolkit (3.0.24) depends on wcwidth (*)
   1: selecting prompt-toolkit (3.0.24)
   1: selecting decorator (5.1.0)
   1: fact: packaging (21.3) depends on pyparsing (>=2.0.2,<3.0.5 || >3.0.5)
   1: selecting packaging (21.3)
   1: derived: pyparsing (>=2.0.2,!=3.0.5)
   1: selecting pyparsing (3.0.6)
   1: selecting pygments (2.10.0)
   1: fact: numpy (1.21.5) requires Python >=3.7,<3.11
   1: derived: not numpy (==1.21.5)
   1: fact: numpy (1.21.4) requires Python >=3.7,<3.11
   1: derived: not numpy (==1.21.4)
   1: fact: numpy (1.21.3) requires Python >=3.7,<3.11
   1: derived: not numpy (==1.21.3)
   1: fact: numpy (1.21.2) requires Python >=3.7,<3.11
   1: derived: not numpy (==1.21.2)
   1: selecting numpy (1.21.1)
   1: selecting typing-extensions (4.0.1)
   1: fact: pexpect (4.8.0) depends on ptyprocess (>=0.5)
   1: selecting pexpect (4.8.0)
   1: derived: ptyprocess (>=0.5)
   1: selecting ptyprocess (0.7.0)
   1: selecting atomicwrites (1.4.0)
   1: selecting pyreadline (2.1)
   1: selecting appnope (0.1.2)
   1: selecting colorama (0.4.4)
   1: Version solving took 0.253 seconds.
   1: Tried 1 solutions.
   0: Complete version solving took 84.019 seconds with 2 overrides
   0: Resolved with overrides: ({Package('black', '21.12b0'): {'typing-extensions': <Dependency typing-extensions (>=3.10.0.0)>}}), ({Package('black', '21.12b0'): {'typing-extensions': <Dependency typing-extensions (!=3.10.0.1)>}})

[alecandido]

Thank you for your data. 90 seconds it's more similar (same scale) but much more reasonable, for a cache-less installation.

It's weird that apparently same tool in same conditions has such different results. Of course this means that the conditions are not the same, but it also yields that we are not controlling the very relevant differences.

I guess possible differences are:

• poetry version: 1.1.11 @jimmywan, 1.1.12 me, 1.2.0a2 @item4
• installation (maybe): for sure I installed with pipx, but I would say this shouldn't make any difference (but I don't know what is making the difference, so I put nevertheless)
• network: apparently not very relevant known differences, but for sure we have different networks and we're geographically spread
• a huge who knows...

[jimmywan]

I guess possible differences are:

• poetry version: 1.1.11 @jimmywan, 1.1.12 me, 1.2.0a2 @item4

FYI, my last test was with 1.1.12.

[maciejskorski]

I checked this on the recent master, also works fine.

[item4]

@maciejskorski how can i try with master branch? is it just can use with --preview flag installation?