zarr-developers
diff --git a/‎changes/2944.misc.rst
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+1Lines changed: 1 addition & 0 deletions b/‎changes/2944.misc.rst
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+1Lines changed: 1 addition & 0 deletions
diff --git a/‎src/zarr/storage/_local.py
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+4-2Lines changed: 4 additions & 2 deletions b/‎src/zarr/storage/_local.py
Copy file name to clipboardExpand all lines: src/zarr/storage/_local.py
+4-2Lines changed: 4 additions & 2 deletions
@@ -0,0 +1 @@
+Avoid an unnecessary memory copy when writing Zarr to a local file
@@ -51,15 +51,17 @@ def _put(
     if start is not None:
         with path.open("r+b") as f:
             f.seek(start)
-            f.write(value.as_numpy_array().tobytes())
+            # write takes any object supporting the buffer protocol
+            f.write(value.as_numpy_array())  # type: ignore[arg-type]
         return None
     else:
-        view = memoryview(value.as_numpy_array().tobytes())
+        view = memoryview(value.as_numpy_array())  # type: ignore[arg-type]
         if exclusive:
             mode = "xb"
         else:
             mode = "wb"
         with path.open(mode=mode) as f:
+            # write takes any object supporting the buffer protocol
             return f.write(view)
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+Avoid an unnecessary memory copy when writing Zarr to a local file`