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gh-93033: Use wmemchr in stringlib (GH-93034)

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Generally comparable perf for the "good" case where memchr doesn't
return any collisions (false matches on lower byte) but clearly faster
with collisions.
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goldsteinn 2022-05-23 20:45:31 -05:00 • committed by GitHub
parent f7fabae75c
commit 7108bdf27c
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11 changed files with 39 additions and 14 deletions
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4
Objects/stringlib/ucs2lib.h
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@ -21,6 +21,10 @@
#define STRINGLIB_CHECK PyUnicode_Check
#define STRINGLIB_CHECK_EXACT PyUnicode_CheckExact
#define STRINGLIB_MUTABLE 0
#if SIZEOF_WCHAR_T == 2
#define STRINGLIB_FAST_MEMCHR(s, c, n) \
(Py_UCS2 *)wmemchr((const wchar_t *)(s), c, n)
#endif
#define STRINGLIB_TOSTR PyObject_Str
#define STRINGLIB_TOASCII PyObject_ASCII