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Speed-up lazy heapq import in collections #127538

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Merged
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Dec 3, 2024
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Speed-up lazy heapq import in collections #127538

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7 changes: 6 additions & 1 deletion Lib/collections/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,8 @@
except ImportError:
pass

heapq = None # Lazily imported


################################################################################
### OrderedDict
Expand Down Expand Up @@ -633,7 +635,10 @@ def most_common(self, n=None):
return sorted(self.items(), key=_itemgetter(1), reverse=True)

# Lazy import to speedup Python startup time
import heapq
global heapq
if heapq is None:
import heapq

return heapq.nlargest(n, self.items(), key=_itemgetter(1))

def elements(self):
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