From: Ma Lin <animalize@users.noreply.github.com>
Date: Tue, 3 May 2022 14:41:45 +0000 (+0800)
Subject: GH-91355: micro-optimize Connection.send_bytes() method (gh-32247)
X-Git-Tag: v3.11.0b1~93
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1699128c4891da3bbe23553d709261d88855b93f;p=thirdparty%2FPython%2Fcpython.git

GH-91355: micro-optimize Connection.send_bytes() method (gh-32247)
---

diff --git a/Lib/multiprocessing/connection.py b/Lib/multiprocessing/connection.py
index 1cca66d5661e..65303d29f51f 100644
--- a/Lib/multiprocessing/connection.py
+++ b/Lib/multiprocessing/connection.py
@@ -188,10 +188,9 @@ class _ConnectionBase:
         self._check_closed()
         self._check_writable()
         m = memoryview(buf)
-        # HACK for byte-indexing of non-bytewise buffers (e.g. array.array)
         if m.itemsize > 1:
-            m = memoryview(bytes(m))
-        n = len(m)
+            m = m.cast('B')
+        n = m.nbytes
         if offset < 0:
             raise ValueError("offset is negative")
         if n < offset: