Issue 25147: add reason for using _collections

c791507e · Ethan Furman · b134a2a5 · c791507e
Commit c791507e authored Sep 17, 2015 by Ethan Furman
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Lib/enum.py Lib/enum.py +1 -0

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--- a/Lib/enum.py
+++ b/Lib/enum.py
 import sys
 from types import MappingProxyType, DynamicClassAttribute

+# try _collections first to reduce startup cost
 try:
    from _collections import OrderedDict
 except ImportError: