bpo-38092: Reduce overhead when using multiprocessing in a Windows virtual environment (GH-16098)
https://bugs.python.org/issue38092
diff --git a/Lib/multiprocessing/popen_spawn_win32.py b/Lib/multiprocessing/popen_spawn_win32.py
index ea9c555..9c4098d 100644
--- a/Lib/multiprocessing/popen_spawn_win32.py
+++ b/Lib/multiprocessing/popen_spawn_win32.py
@@ -72,7 +72,7 @@
try:
hp, ht, pid, tid = _winapi.CreateProcess(
python_exe, cmd,
- env, None, False, 0, None, None, None)
+ None, None, False, 0, env, None, None)
_winapi.CloseHandle(ht)
except:
_winapi.CloseHandle(rhandle)
diff --git a/Lib/multiprocessing/spawn.py b/Lib/multiprocessing/spawn.py
index 7cc129e..075f345 100644
--- a/Lib/multiprocessing/spawn.py
+++ b/Lib/multiprocessing/spawn.py
@@ -36,7 +36,7 @@
if WINSERVICE:
_python_exe = os.path.join(sys.exec_prefix, 'python.exe')
else:
- _python_exe = sys.executable
+ _python_exe = sys._base_executable
def set_executable(exe):
global _python_exe
diff --git a/Misc/NEWS.d/next/Windows/2019-09-13-14-11-42.bpo-38092.x31ehI.rst b/Misc/NEWS.d/next/Windows/2019-09-13-14-11-42.bpo-38092.x31ehI.rst
new file mode 100644
index 0000000..48e83c8
--- /dev/null
+++ b/Misc/NEWS.d/next/Windows/2019-09-13-14-11-42.bpo-38092.x31ehI.rst
@@ -0,0 +1 @@
+Reduce overhead when using multiprocessing in a Windows virtual environment.