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Merged revisions 81654 via svnmerge from 

svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r81654 | antoine.pitrou | 2010-06-02 19:10:49 +0200 (mer., 02 juin 2010) | 10 lines

  Merged revisions 81652 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

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    r81652 | antoine.pitrou | 2010-06-02 19:08:47 +0200 (mer., 02 juin 2010) | 4 lines

    Issue #8873: add a documentation note about possible performance issues with the
    default of unbuffered IO in subprocess.Popen.
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Antoine Pitrou 2010-06-02 17:11:32 +00:00
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6
Doc/library/subprocess.rst
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@ -88,6 +88,12 @@ 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,