From 3db985f04ad41245c0651a7b1d4da2c280acb78a Mon Sep 17 00:00:00 2001
From: Anton Volkov <antonwolfy@gmail.com>
Date: Tue, 8 Jul 2025 14:34:20 +0200
Subject: [PATCH] Add a fast path to copy to numpy.ndarray

---
 dpctl/tensor/_copy_utils.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/dpctl/tensor/_copy_utils.py b/dpctl/tensor/_copy_utils.py
index c80733f77f..ecea9f860b 100644
--- a/dpctl/tensor/_copy_utils.py
+++ b/dpctl/tensor/_copy_utils.py
@@ -41,6 +41,9 @@
 def _copy_to_numpy(ary):
     if not isinstance(ary, dpt.usm_ndarray):
         raise TypeError(f"Expected dpctl.tensor.usm_ndarray, got {type(ary)}")
+    if ary.size == 0:
+        # no data needs to be copied for zero sized array
+        return np.ndarray(ary.shape, dtype=ary.dtype)
     nb = ary.usm_data.nbytes
     q = ary.sycl_queue
     hh = dpm.MemoryUSMHost(nb, queue=q)