Package: python-cryptography
Version: 1.7.1-2
Severity: important
Dear Maintainer,
the loading of the cryptography.hazmat.backends module is very slow on
my stretch machine:
david@stretch:~$ time python -c "import cryptography.hazmat.backends"
real 0m0.586s
user 0m0.540s
sys 0m0.040s
For the record, I've tested the latest version in a virtualenv (using
system-site-packages to ensure we only check the update of cryptography):
david@stretch:~$ virtualenv --system-site-packages /tmp/tst
[...]
david@stretch:~$ /tmp/tst/bin/pip install "cryptography>1.8"
[...]
david@stretch:~$ time /tmp/tst/bin/python -c "import
cryptography.hazmat.backends"
real 0m0.045s
user 0m0.036s
sys 0m0.004s
Same tests on a jessie machine:
david@jessie:~$ dpkg -l python-cryptography
[...]
ii python-cryptography 0.6.1-1 amd64
david@jessie:~$ time python -c "import cryptography.hazmat.backends"
real 0m0.249s
user 0m0.112s
sys 0m0.048s
using python-cruptography from jessie-backports:
david@jessie:~$ sudo apt-get install python-cryptography -t
jessie-backports
[...]
Setting up python-cryptography (1.3.4-1~bpo8+2) ...
david@jessie:~$ time python -c "import cryptography.hazmat.backends"
real 0m0.567s
user 0m0.440s
sys 0m0.052s
and using the latest versions in a venv:
david@jessie:~$ virtualenv --system-site-packages /tmp/tst
[...]
david@jessie:~$ /tmp/tst/bin/pip install "cryptography>1.8"
[...]
david@jessie:~$ time /tmp/tst/bin/python -c "import
cryptography.hazmat.backends"
real 0m0.117s
user 0m0.052s
sys 0m0.028s
So I guess python-cruptography might need to be updated to latest (1.8.1
as I write this). The patch in the debian package might also be the
culprit.
-- System Information:
Debian Release: 9.0
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386, armhf
Kernel: Linux 4.9.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages python-cryptography depends on:
ii libc6 2.24-9
ii libssl1.1 1.1.0e-1
ii python 2.7.13-2
pn python-cffi-backend-api-max <none>
pn python-cffi-backend-api-min <none>
ii python-enum34 1.1.6-1
ii python-idna 2.2-1
ii python-ipaddress 1.0.17-1
ii python-pyasn1 0.1.9-2
ii python-setuptools 33.1.1-1
ii python-six 1.10.0-3
pn python:any <none>
python-cryptography recommends no packages.
Versions of packages python-cryptography suggests:
pn python-cryptography-doc <none>
pn python-cryptography-vectors <none>
-- no debconf information
