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Issue 11802: filecmp cache was growing without bound.

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This commit is contained in:
Raymond Hettinger 2011-06-25 17:20:21 +02:00
parent 6ddefd7916
commit 70797194ab
1 changed files with 6 additions and 5 deletions
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11
Lib/filecmp.py
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@ -48,11 +48,12 @@ def cmp(f1, f2, shallow=True):
if s1[1] != s2[1]:
return False
result = _cache.get((f1, f2))
if result and (s1, s2) == result[:2]:
return result[2]
outcome = _do_cmp(f1, f2)
_cache[f1, f2] = s1, s2, outcome
outcome = _cache.get((f1, f2, s1, s2))
if outcome is None:
outcome = _do_cmp(f1, f2)
if len(_cache) > 100: # limit the maximum size of the cache
_cache.clear()
_cache[f1, f2, s1, s2] = outcome
return outcome
def _sig(st):