[Python-checkins] r73697 - python/trunk/Lib/collections.py
raymond.hettinger
python-checkins at python.org
Mon Jun 29 21:10:29 CEST 2009
Author: raymond.hettinger
Date: Mon Jun 29 21:10:29 2009
New Revision: 73697
Log:
Issue 6370: Performance issue with collections.Counter().
Modified:
python/trunk/Lib/collections.py
Modified: python/trunk/Lib/collections.py
==============================================================================
--- python/trunk/Lib/collections.py (original)
+++ python/trunk/Lib/collections.py Mon Jun 29 21:10:29 2009
@@ -418,13 +418,15 @@
if iterable is not None:
if isinstance(iterable, Mapping):
if self:
+ self_get = self.get
for elem, count in iterable.iteritems():
- self[elem] += count
+ self[elem] = self_get(elem, 0) + count
else:
dict.update(self, iterable) # fast path when counter is empty
else:
+ self_get = self.get
for elem in iterable:
- self[elem] += 1
+ self[elem] = self_get(elem, 0) + 1
if kwds:
self.update(kwds)
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