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Title:
[20.0.5+] 280ms overhead on python startup Β· Issue #1682 Β· pypa/virtualenv
Description:
Issue The changes to site.py introduce an (unacceptable imo) 280ms startup penalty under python 2.x I created virtualenvs via the following rm -rf venv venv_20_0_4 20_0_5 virtualenv venv venv/bin/pip install virtualenv==20.0.4 venv/bin/v...
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gaborbernat, python, virtualenv, commented, contributor, asottile, venv, fix, issue, setuptools, distutils, startup, time, import, sign, brew, macos, author, dont, tools, install, venvbinpython, real, user, sys, file, solution, longer, navigation, open, issues, pull, requests, actions, security, overhead, sitepy, unacceptable, created, venvbinpip, venvbinvirtualenv, due, path, added, bug, work, hook, unconditionally, pth, enhancement,
Topics {βοΈ}
gaborbernat edits contributor open issues historically virtualenv supported setuptools support virtualenv virtualenv support setuptools comment metadata assignees assigned labels enhancement fixup post-import break tools behaviour 280ms startup penalty actual fix π€·ββοΈi' virtualenv 16 worked install pip distutils configuration startup time venv 005s sys pth file virtualenv virtualenv 16 5+] 280ms overhead distutils hack import hook py import py introduce 011s user 291s user 214s sys 212s user 187s sys tools generally virtual environments agree importing framework builds aware upstream projects milestone milestone relationships personal information [20 distutils related distutils copy brew python issue longer compatible longer works unacceptable imo created virtualenvs critical path work correctly hot patch
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- Already have an account?
- Can we only put the distutils hack in when it's needed (instead of unconditionally?
- Does this affect all framework builds or just the ones that ship with brew?
Schema {πΊοΈ}
DiscussionForumPosting:
context:https://schema.org
headline:[20.0.5+] 280ms overhead on python startup
articleBody:**Issue**
The changes to `site.py` introduce an (unacceptable imo) 280ms startup penalty under python 2.x
I created virtualenvs via the following
```
rm -rf venv venv_20_0_4 20_0_5
virtualenv venv
venv/bin/pip install virtualenv==20.0.4
venv/bin/virtualenv venv_20_0_4 -p python2
venv/bin/pip install virtualenv==20.0.5
venv/bin/virtualenv venv_20_0_5 -p python2
```
comparing the startup time between the two:
```console
$ time venv_20_0_4/bin/python -c ''
real 0m0.011s
user 0m0.005s
sys 0m0.005s
$ time venv_20_0_5/bin/python -c ''
real 0m0.291s
user 0m0.214s
sys 0m0.027s
```
this is (almost certainly) due to the import of `setuptools` in the critical path:
```console
$ time venv_20_0_4/bin/python -c 'import setuptools'
real 0m0.212s
user 0m0.187s
sys 0m0.025s
```
author:
url:https://github.com/asottile
type:Person
name:asottile
datePublished:2020-03-01T02:52:45.000Z
interactionStatistic:
type:InteractionCounter
interactionType:https://schema.org/CommentAction
userInteractionCount:12
url:https://github.com/1682/virtualenv/issues/1682
context:https://schema.org
headline:[20.0.5+] 280ms overhead on python startup
articleBody:**Issue**
The changes to `site.py` introduce an (unacceptable imo) 280ms startup penalty under python 2.x
I created virtualenvs via the following
```
rm -rf venv venv_20_0_4 20_0_5
virtualenv venv
venv/bin/pip install virtualenv==20.0.4
venv/bin/virtualenv venv_20_0_4 -p python2
venv/bin/pip install virtualenv==20.0.5
venv/bin/virtualenv venv_20_0_5 -p python2
```
comparing the startup time between the two:
```console
$ time venv_20_0_4/bin/python -c ''
real 0m0.011s
user 0m0.005s
sys 0m0.005s
$ time venv_20_0_5/bin/python -c ''
real 0m0.291s
user 0m0.214s
sys 0m0.027s
```
this is (almost certainly) due to the import of `setuptools` in the critical path:
```console
$ time venv_20_0_4/bin/python -c 'import setuptools'
real 0m0.212s
user 0m0.187s
sys 0m0.025s
```
author:
url:https://github.com/asottile
type:Person
name:asottile
datePublished:2020-03-01T02:52:45.000Z
interactionStatistic:
type:InteractionCounter
interactionType:https://schema.org/CommentAction
userInteractionCount:12
url:https://github.com/1682/virtualenv/issues/1682
Person:
url:https://github.com/asottile
name:asottile
url:https://github.com/asottile
name:asottile
InteractionCounter:
interactionType:https://schema.org/CommentAction
userInteractionCount:12
interactionType:https://schema.org/CommentAction
userInteractionCount:12
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