On Wed, 10 May 2017 at 16:36 David Douard <david.dou...@logilab.fr> wrote:

> the loading of the cryptography.hazmat.backends module is very slow on
> my stretch machine:
>

This is ultimately caused by pkg_resources doing slow things at import time:

https://github.com/pypa/setuptools/issues/510

Cryptography 1.8.1 includes a workaround deferring the import of
pkg_resources to when default_backend is called:

https://github.com/pyca/cryptography/commit/aa396c0805aced49d5502fafa20f304a23e369a7

Which probably explains your virtualenv results.

However, given that stretch is frozen now, I'm not sure there is anything
to be done about it at this stage.

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