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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/replace.h
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@ -29,9 +29,9 @@ STRINGLIB(replace_1char_inplace)(STRINGLIB_CHAR* s, STRINGLIB_CHAR* end,
if (!--attempts) {
/* if u1 was not found for attempts iterations,
use FASTSEARCH() or memchr() */
#if STRINGLIB_SIZEOF_CHAR == 1
#ifdef STRINGLIB_FAST_MEMCHR
s++;
s = memchr(s, u1, end - s);
s = STRINGLIB_FAST_MEMCHR(s, u1, end - s);
if (s == NULL)
return;
#else