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| -rw-r--r-- | Doc/library/subprocess.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Doc/library/subprocess.rst b/Doc/library/subprocess.rst index 4b19761..c7a349b 100644 --- a/Doc/library/subprocess.rst +++ b/Doc/library/subprocess.rst @@ -89,6 +89,12 @@ This module defines one class called :class:`Popen`: size. A negative *bufsize* means to use the system default, which usually means fully buffered. The default value for *bufsize* is :const:`0` (unbuffered). + .. note:: + + If you experience performance issues, it is recommended that you try to + enable buffering by setting *bufsize* to either -1 or a large enough + positive value (such as 4096). + The *executable* argument specifies the program to execute. It is very seldom needed: Usually, the program to execute is defined by the *args* argument. If ``shell=True``, the *executable* argument specifies which shell to use. On Unix, |