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bpo-34636: Use fast path for more chars in SRE category macros. #9170

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Merged
merged 2 commits into from
Sep 11, 2018
Merged

bpo-34636: Use fast path for more chars in SRE category macros. #9170

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6f4577e
Use fast path for more characters in SRE category macros.
sir-sigurd Sep 11, 2018
9714bb4
Add NEWS entry.
gpshead Sep 11, 2018
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2018-09-11-15-04-05.bpo-34636.capCmt.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Speed up re scanning of many non-matching characters for \s \w and \d within
bytes objects. (microoptimization)
6 changes: 3 additions & 3 deletions Modules/_sre.c
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Expand Up @@ -87,13 +87,13 @@ static const char copyright[] =
/* search engine state */

#define SRE_IS_DIGIT(ch)\
((ch) < 128 && Py_ISDIGIT(ch))
((ch) <= '9' && Py_ISDIGIT(ch))
#define SRE_IS_SPACE(ch)\
((ch) < 128 && Py_ISSPACE(ch))
((ch) <= ' ' && Py_ISSPACE(ch))
#define SRE_IS_LINEBREAK(ch)\
((ch) == '\n')
#define SRE_IS_WORD(ch)\
((ch) < 128 && (Py_ISALNUM(ch) || (ch) == '_'))
((ch) <= 'z' && (Py_ISALNUM(ch) || (ch) == '_'))

static unsigned int sre_lower_ascii(unsigned int ch)
{
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