From 293b03f73f5ad48719a0f07fb45857182dfb1d51 Mon Sep 17 00:00:00 2001
From: Barry Warsaw <barry@python.org>
Date: Thu, 5 Oct 2000 18:48:12 +0000
Subject: [PATCH] translation(): Minor optimization patch which avoids
 instantiating the default value's instance unless it's absolutely necessary.

---
 Lib/gettext.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Lib/gettext.py b/Lib/gettext.py
index 724cecb4c00..578490f68cc 100644
--- a/Lib/gettext.py
+++ b/Lib/gettext.py
@@ -235,7 +235,11 @@ def translation(domain, localedir=None, languages=None, class_=None):
         raise IOError(ENOENT, 'No translation file found for domain', domain)
     key = os.path.abspath(mofile)
     # TBD: do we need to worry about the file pointer getting collected?
-    t = _translations.setdefault(key, class_(open(mofile, 'rb')))
+    # Avoid opening, reading, and parsing the .mo file after it's been done
+    # once.
+    t = _translations.get(key)
+    if t is None:
+        t = _translations.setdefault(key, class_(open(mofile, 'rb')))
     return t