diff --git a/Lib/_pyio.py b/Lib/_pyio.py
index 14961c39d3541d..6fea290df30d50 100644
--- a/Lib/_pyio.py
+++ b/Lib/_pyio.py
@@ -1695,10 +1695,20 @@ def readall(self):
     def readinto(self, b):
         """Same as RawIOBase.readinto()."""
         m = memoryview(b).cast('B')
-        data = self.read(len(m))
-        n = len(data)
-        m[:n] = data
-        return n
+        self._checkClosed()
+        self._checkReadable()
+        try:
+            if hasattr(os, 'readv'):
+                return os.readv(self._fd, (m, ))
+
+            data = os.read(self._fd, len(m))
+            n = len(data)
+            m[:n] = data
+            return n
+        except BlockingIOError:
+            return None
+
+
 
     def write(self, b):
         """Write bytes b to file, return number written.
diff --git a/Misc/NEWS.d/next/Library/2025-01-18-15-29-08.gh-issue-129005.mM5dmV.rst b/Misc/NEWS.d/next/Library/2025-01-18-15-29-08.gh-issue-129005.mM5dmV.rst
new file mode 100644
index 00000000000000..fabb593ae58513
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-01-18-15-29-08.gh-issue-129005.mM5dmV.rst
@@ -0,0 +1 @@
+Optimize ``_pyio.FileIO.readinto`` by using :func:`os.readv` on platforms that support it which avoids an additional copy.