[issue36775] Rework filesystem codec implementation

[STINNER Victor]

New submission from STINNER Victor <vstinner at redhat.com>:

I would like to add callbacks in PyInterpreterState for the filesystem encoding to avoid parsing the encoding name at each encode/decode call (PyUnicode_EncodeFSDefault, PyUnicode_DecodeFSDefault).

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components: Interpreter Core
messages: 341267
nosy: vstinner
priority: normal
severity: normal
status: open
title: Rework filesystem codec implementation
versions: Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue36775>
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