From 2260fca5203f0a2c21741e696f1db44688a98502 Mon Sep 17 00:00:00 2001
From: Pieter Eendebak <pieter.eendebak@gmail.com>
Date: Mon, 25 Sep 2023 22:50:56 +0200
Subject: [PATCH] Skip deepcopy memo check for empty memo

---
 Lib/copy.py | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/Lib/copy.py b/Lib/copy.py
index 6d7bb9a111b5b4..a69bc4e78c20b3 100644
--- a/Lib/copy.py
+++ b/Lib/copy.py
@@ -121,13 +121,13 @@ def deepcopy(x, memo=None, _nil=[]):
     See the module's __doc__ string for more info.
     """
 
+    d = id(x)
     if memo is None:
         memo = {}
-
-    d = id(x)
-    y = memo.get(d, _nil)
-    if y is not _nil:
-        return y
+    else:
+        y = memo.get(d, _nil)
+        if y is not _nil:
+            return y
 
     cls = type(x)