New submission from Shivaram Lingamneni <sling...@cs.stanford.edu>:
Importing the idna encoding has a significant time and memory cost. Therefore,
the standard library tries to avoid importing it when it's not needed (i.e.
when the domain name is already pure ASCII), e.g. in Lib/http/client.py and
Modules/socketmodule.c with `idna_converter`.
However, there are code paths that still attempt to encode or decode as idna
unconditionally, in particular Lib/ssl.py and _socket.getaddrinfo. Here's a
one-line test case:
python3 -c "import sys, urllib.request;
urllib.request.urlopen('https://www.google.com'); assert 'encodings.idna' not
in sys.modules"
These code paths can be converted using existing code to do the import
conditionally (I'll send a PR).
----------
assignee: christian.heimes
components: Interpreter Core, Library (Lib), SSL
messages: 413229
nosy: christian.heimes, slingamn
priority: normal
severity: normal
status: open
title: some code paths in ssl and _socket still import idna unconditionally
type: resource usage
versions: Python 3.11
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue46750>
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