From: Benjamin Peterson <benjamin@python.org>
Date: Wed, 18 Apr 2012 19:25:50 +0000 (-0400)
Subject: don't bother keeping a set we'll never use
X-Git-Tag: v3.3.0a3~158
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=2a481e58ffe7d7719b856e2778751521d266d33a;p=python

don't bother keeping a set we'll never use
---

diff --git a/Lib/importlib/_bootstrap.py b/Lib/importlib/_bootstrap.py
index 142461aaf2..6478db5d23 100644
--- a/Lib/importlib/_bootstrap.py
+++ b/Lib/importlib/_bootstrap.py
@@ -842,7 +842,8 @@ class _FileFinder:
         # We store two cached versions, to handle runtime changes of the
         # PYTHONCASEOK environment variable.
         self._path_cache = set(contents)
-        self._relaxed_path_cache = set(fn.lower() for fn in contents)
+        if sys.platform.startswith(CASE_INSENSITIVE_PLATFORMS):
+            self._relaxed_path_cache = set(fn.lower() for fn in contents)
 
 
 class _SourceFinderDetails: