It contains the executables: easy_install, distro, chardetect etc.
It should not be picked as vendored library.
Related to https://github.com/pypa/pip/issues/5347
* Upgrade setuptools to 34.3.2
* Upgrade appdirs to 1.4.3
* Upgrade CacheControl to 0.12.1
* Upgrade distro to 1.0.2
* Upgrade ipaddress to 1.0.18
* Upgrade pyparsing to 2.2.0
* Upgrade requests to 2.13.0
* Remove patching of progress
* Don't translate imports that would be syntax errors
* Patch pkg_resources to handle packaging correctly
This change promises a performance improvement of up to 25%:
# Before
$ time pip install django --no-compile
2.34s user 2.49s system 47% cpu 10.106 total
# With this patch
$ time pip install django --no-compile
1.82s user 2.10s system 51% cpu 7.646 total
Both tests have been performed with hot caches.