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revset: added cache to lazysets

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This allows __contains__ to return faster when asked for same value twice.
This commit is contained in:
Lucas Moscovicz 2014-02-04 15:31:57 -08:00
parent b35d905ff6
commit 3d8c71a8cc
1 changed files with 5 additions and 1 deletions
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6
mercurial/revset.py
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@ -2117,9 +2117,13 @@ class lazyset(object):
def __init__(self, subset, condition): def __init__(self, subset, condition):
self._subset = subset self._subset = subset
self._condition = condition self._condition = condition
self._cache = {}
def __contains__(self, x): def __contains__(self, x):
return x in self._subset and self._condition(x) c = self._cache
if x not in c:
c[x] = x in self._subset and self._condition(x)
return c[x]
def __iter__(self): def __iter__(self):
cond = self._condition cond = self._condition