Slow pip install due to django-sources

[K0Te]

Hi,

I've tried to run scripts/typecheck_tests.py to verify some changes.
AFAIK is needed to re-install django-stubs in order to re-run scripts/typecheck_tests.py with modifications. However, this scripts install django-sources in project root folder and this affect pip install -U speed:

$ time pip3.7 install -U .
Processing /Users/kote/github/django-stubs
Requirement already satisfied, skipping upgrade: Django in /usr/local/lib/python3.7/site-packages (from django-stubs==0.2.0) (2.1.5)
Requirement already satisfied, skipping upgrade: mypy in /usr/local/lib/python3.7/site-packages (from django-stubs==0.2.0) (0.660)
Requirement already satisfied, skipping upgrade: pytz in /usr/local/lib/python3.7/site-packages (from Django->django-stubs==0.2.0) (2018.9)
Requirement already satisfied, skipping upgrade: typed-ast<1.3.0,>=1.2.0 in /usr/local/lib/python3.7/site-packages (from mypy->django-stubs==0.2.0) (1.2.0)
Requirement already satisfied, skipping upgrade: mypy-extensions<0.5.0,>=0.4.0 in /usr/local/lib/python3.7/site-packages (from mypy->django-stubs==0.2.0) (0.4.1)
Building wheels for collected packages: django-stubs
  Running setup.py bdist_wheel for django-stubs ... done
  Stored in directory: /Users/kote/Library/Caches/pip/wheels/d7/e7/6b/7e469272d213a3673cde0b8793a8d739ad8407a3676a70dabf
Successfully built django-stubs
Installing collected packages: django-stubs
  Found existing installation: django-stubs 0.2.0
    Uninstalling django-stubs-0.2.0:
      Successfully uninstalled django-stubs-0.2.0
Successfully installed django-stubs-0.2.0

real	1m10.033s
user	0m13.555s

# without django-sources
$ time pip3.7 install -U .
Processing /Users/kote/github/django-stubs
Requirement already satisfied, skipping upgrade: Django in /usr/local/lib/python3.7/site-packages (from django-stubs==0.2.0) (2.1.5)
Requirement already satisfied, skipping upgrade: mypy in /usr/local/lib/python3.7/site-packages (from django-stubs==0.2.0) (0.660)
Requirement already satisfied, skipping upgrade: pytz in /usr/local/lib/python3.7/site-packages (from Django->django-stubs==0.2.0) (2018.9)
Requirement already satisfied, skipping upgrade: mypy-extensions<0.5.0,>=0.4.0 in /usr/local/lib/python3.7/site-packages (from mypy->django-stubs==0.2.0) (0.4.1)
Requirement already satisfied, skipping upgrade: typed-ast<1.3.0,>=1.2.0 in /usr/local/lib/python3.7/site-packages (from mypy->django-stubs==0.2.0) (1.2.0)
Building wheels for collected packages: django-stubs
  Running setup.py bdist_wheel for django-stubs ... done
  Stored in directory: /Users/kote/Library/Caches/pip/wheels/d7/e7/6b/7e469272d213a3673cde0b8793a8d739ad8407a3676a70dabf
Successfully built django-stubs
Installing collected packages: django-stubs
  Found existing installation: django-stubs 0.2.0
    Uninstalling django-stubs-0.2.0:
      Successfully uninstalled django-stubs-0.2.0
Successfully installed django-stubs-0.2.0

real	0m2.939s
user	0m1.677s
sys	0m1.193s

[mkurnikov]

@K0Te Could you test how slow it is now, after removing old django-sources and rerunning typecheck_tests.py? Should be faster.

[K0Te]

Works much better now, thanks !