[New-bugs-announce] [issue37752] Redundant Py_CHARMASK called in normalizestring(codecs.c)

[Jordon.X]

New submission from Jordon.X <9651234 at qq.com>:

In normalizestring(),
            ch = Py_TOLOWER(Py_CHARMASK(ch));
Where Py_TOLOWER is defined as following,
            #define Py_TOLOWER(c) (_Py_ctype_tolower[Py_CHARMASK(c)])

Redundant Py_CHARMASK called here.

----------
components: Unicode
messages: 348955
nosy: ezio.melotti, qigangxu, vstinner
priority: normal
severity: normal
status: open
title: Redundant Py_CHARMASK called in normalizestring(codecs.c)
type: performance
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37752>
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