Set cache sizes to a power-of-two

rhettinger · rhettinger · commit d0dbb20f5fcd · 2013-02-17T01:33:37.000-08:00
diff --git a/Lib/fnmatch.py b/Lib/fnmatch.py
@@ -35,7 +35,7 @@ def fnmatch(name, pat):
     pat = os.path.normcase(pat)
     return fnmatchcase(name, pat)
 
-@functools.lru_cache(maxsize=250, typed=True)
+@functools.lru_cache(maxsize=256, typed=True)
 def _compile_pattern(pat):
     if isinstance(pat, bytes):
         pat_str = str(pat, 'ISO-8859-1')
diff --git a/Lib/re.py b/Lib/re.py
@@ -261,7 +261,7 @@ def escape(pattern):
 
 _pattern_type = type(sre_compile.compile("", 0))
 
-@functools.lru_cache(maxsize=500, typed=True)
+@functools.lru_cache(maxsize=512, typed=True)
 def _compile(pattern, flags):
     # internal: compile pattern
     if isinstance(pattern, _pattern_type):
@@ -273,7 +273,7 @@ def _compile(pattern, flags):
         raise TypeError("first argument must be string or compiled pattern")
     return sre_compile.compile(pattern, flags)
 
-@functools.lru_cache(maxsize=500)
+@functools.lru_cache(maxsize=512)
 def _compile_repl(repl, pattern):
     # internal: compile replacement pattern
     return sre_parse.parse_template(repl, pattern)
