python
diff --git a/Lib/copy.py b/Lib/copy.py
@@ -185,6 +185,7 @@ def _deepcopy_atomic(x, memo):
 d[types.CodeType] = _deepcopy_atomic
 d[type] = _deepcopy_atomic
 d[range] = _deepcopy_atomic
+d[slice] = _deepcopy_atomic
 d[types.BuiltinFunctionType] = _deepcopy_atomic
 d[types.FunctionType] = _deepcopy_atomic
 d[weakref.ref] = _deepcopy_atomic

diff --git a/Lib/test/test_copy.py b/Lib/test/test_copy.py
@@ -354,7 +354,7 @@ def f():
             pass
         tests = [None, 42, 2**100, 3.14, True, False, 1j,
                  "hello", "hello\u1234", f.__code__,
-                 NewStyle, range(10), max, property()]
+                 NewStyle, range(10), max, property(), slice(1, 10, 1)]
         for x in tests:
             self.assertIs(copy.deepcopy(x), x)
 

diff --git a/Misc/NEWS.d/next/Library/2023-01-07-12-38-22.gh-issue-100817.7iMrim.rst b/Misc/NEWS.d/next/Library/2023-01-07-12-38-22.gh-issue-100817.7iMrim.rst
@@ -0,0 +1 @@
+Speed up ``copy.deepcopy`` calls on ``slice`` instances.
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		Speed up ``copy.deepcopy`` calls on ``slice`` instances.