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whatsnew: FileIO.readall performance, os.cpu_count. 

And more news item tweaks.
This commit is contained in:
R David Murray 2014-01-08 17:21:22 -05:00
parent 6f17deb9bb
commit 66bf12a58e
2 changed files with 18 additions and 4 deletions
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12
Doc/whatsnew/3.4.rst
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@ -853,6 +853,11 @@ descriptors or a Windows handle:
* :func:`os.get_inheritable`, :func:`os.set_inheritable` * :func:`os.get_inheritable`, :func:`os.set_inheritable`
* :func:`os.get_handle_inheritable`, :func:`os.set_handle_inheritable` * :func:`os.get_handle_inheritable`, :func:`os.set_handle_inheritable`
The :mod:`os` module now provides a :func:`~os.cpu_count` function, analogous to
the :func:`multiprocessing.cpu_count` function (which is now implemented in
terms of the new :mod:`os` function). (Contributed by Trent Nelson, Yogesh
Chaudhari, Victor Stinner, and Charles-François Natali in :issue:`17914`.)
pdb pdb
--- ---
@ -985,6 +990,8 @@ The ``socket.AF_*`` and ``socket.SOCK_*`` constants are now enumeration values
using the new :mod:`enum` module. This allows meaningful names to be printed using the new :mod:`enum` module. This allows meaningful names to be printed
during debugging, instead of integer "magic numbers". during debugging, instead of integer "magic numbers".
The :data:`~socket.AF_LINK` constant is now available on BSD and OSX.
sqlite3 sqlite3
------- -------
@ -1341,6 +1348,11 @@ Significant Optimizations
strings is now significantly faster. (Contributed by Victor Stinner and strings is now significantly faster. (Contributed by Victor Stinner and
Antoine Pitrou in :issue:`15596`.) Antoine Pitrou in :issue:`15596`.)
* A performance issue in :meth:`io.FileIO.readall` has been solved. This
particularly affects Windows, and significantly speeds up the case of piping
significant amounts of data through :mod:`subprocess`. (Contributed
by Richard Oudkerk in :issue:`15758`.)
Deprecated Deprecated

10
Misc/NEWS
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@ -2163,9 +2163,11 @@ Library
- Issue #15758: Fix FileIO.readall() so it no longer has O(n**2) complexity. - Issue #15758: Fix FileIO.readall() so it no longer has O(n**2) complexity.
- Issue #14596: The struct.Struct() objects now use more compact implementation. - Issue #14596: The struct.Struct() objects now use a more compact
implementation.
- Issue #17981: Closed socket on error in SysLogHandler. - Issue #17981: logging's SysLogHandler now closes the socket when it catches
socket OSErrors.
- Issue #17964: Fix os.sysconf(): the return type of the C sysconf() function - Issue #17964: Fix os.sysconf(): the return type of the C sysconf() function
is long, not int. is long, not int.
@ -2186,8 +2188,8 @@ Library
- Issue #17915: Fix interoperability of xml.sax with file objects returned by - Issue #17915: Fix interoperability of xml.sax with file objects returned by
codecs.open(). codecs.open().
- Issue #16601: Restarting iteration over tarfile no more continues from where - Issue #16601: Restarting iteration over tarfile really restarts rather
it left off. Patch by Michael Birtwell. than continuing from where it left off. Patch by Michael Birtwell.
- Issue #17289: The readline module now plays nicer with external modules - Issue #17289: The readline module now plays nicer with external modules
or applications changing the rl_completer_word_break_characters global or applications changing the rl_completer_word_break_characters global