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Issue #22510: Get rid of little overhead of testing re.DEBUG flag.

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This commit is contained in:
Serhiy Storchaka 2014-09-29 18:13:02 +03:00
parent d034ece5b3
commit 4d75a01798
1 changed files with 5 additions and 7 deletions
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12
Lib/re.py
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@ -273,12 +273,10 @@ _pattern_type = type(sre_compile.compile("", 0))
_MAXCACHE = 512 _MAXCACHE = 512
def _compile(pattern, flags): def _compile(pattern, flags):
# internal: compile pattern # internal: compile pattern
bypass_cache = flags & DEBUG try:
if not bypass_cache: return _cache[type(pattern), pattern, flags]
try: except KeyError:
return _cache[type(pattern), pattern, flags] pass
except KeyError:
pass
if isinstance(pattern, _pattern_type): if isinstance(pattern, _pattern_type):
if flags: if flags:
raise ValueError( raise ValueError(
@ -287,7 +285,7 @@ def _compile(pattern, flags):
if not sre_compile.isstring(pattern): if not sre_compile.isstring(pattern):
raise TypeError("first argument must be string or compiled pattern") raise TypeError("first argument must be string or compiled pattern")
p = sre_compile.compile(pattern, flags) p = sre_compile.compile(pattern, flags)
if not bypass_cache: if not (flags & DEBUG):
if len(_cache) >= _MAXCACHE: if len(_cache) >= _MAXCACHE:
_cache.clear() _cache.clear()
_cache[type(pattern), pattern, flags] = p _cache[type(pattern), pattern, flags] = p