From: Guido van Rossum <guido@python.org>
Date: Mon, 17 Jun 1996 17:10:11 +0000 (+0000)
Subject: Memoize _deepcopy_tuple() -- maybe this helps Tommy's problem.
X-Git-Tag: v1.4b1~57
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=6afff6139a445de62a9cb45dadf1b9ca905f2540;p=python

Memoize _deepcopy_tuple() -- maybe this helps Tommy's problem.
---

diff --git a/Lib/copy.py b/Lib/copy.py
index a48e8c8e3a..15e0e40ad4 100644
--- a/Lib/copy.py
+++ b/Lib/copy.py
@@ -182,8 +182,12 @@ def _deepcopy_tuple(x, memo):
 		pass
 	for i in range(len(x)):
 		if x[i] is not y[i]:
-			return tuple(y)
-	return x
+			y = tuple(y)
+			break
+	else:
+		y = x
+	memo[d] = y
+	return y
 d[types.TupleType] = _deepcopy_tuple
 
 def _deepcopy_dict(x, memo):