Add release note for DeviceMemoryResource performance optimization

Copilot · leofang · Copilot · commit 6a2c4f4d8cab · 2025-08-21T02:56:33.000Z
Co-authored-by: leofang &lt;5534781+leofang@users.noreply.github.com&gt;
diff --git a/cuda_core/docs/source/release/0.X.Y-notes.rst b/cuda_core/docs/source/release/0.X.Y-notes.rst
@@ -36,4 +36,5 @@ None.
 Fixes and enhancements
 ----------------------
 
+- Improved :class:`DeviceMemoryResource` allocation performance when there are no active allocations (addresses issue #771).
 - Fix :class:`LaunchConfig` grid unit conversion when cluster is set (addresses issue #867).
