[Python-checkins] cpython: whatsnew: FileIO.readall performance, os.cpu_count.
r.david.murray
python-checkins at python.org
Wed Jan 8 23:21:34 CET 2014
http://hg.python.org/cpython/rev/57dd16953c8c
changeset: 88358:57dd16953c8c
user: R David Murray <rdmurray at bitdance.com>
date: Wed Jan 08 17:21:22 2014 -0500
summary:
whatsnew: FileIO.readall performance, os.cpu_count.
And more news item tweaks.
files:
Doc/whatsnew/3.4.rst | 12 ++++++++++++
Misc/NEWS | 12 +++++++-----
2 files changed, 19 insertions(+), 5 deletions(-)
diff --git a/Doc/whatsnew/3.4.rst b/Doc/whatsnew/3.4.rst
--- a/Doc/whatsnew/3.4.rst
+++ b/Doc/whatsnew/3.4.rst
@@ -853,6 +853,11 @@
* :func:`os.get_inheritable`, :func:`os.set_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
---
@@ -985,6 +990,8 @@
using the new :mod:`enum` module. This allows meaningful names to be printed
during debugging, instead of integer "magic numbers".
+The :data:`~socket.AF_LINK` constant is now available on BSD and OSX.
+
sqlite3
-------
@@ -1341,6 +1348,11 @@
strings is now significantly faster. (Contributed by Victor Stinner and
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
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -2163,9 +2163,11 @@
- 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 #17981: Closed socket on error in SysLogHandler.
+- Issue #14596: The struct.Struct() objects now use a more compact
+ implementation.
+
+- 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
is long, not int.
@@ -2186,8 +2188,8 @@
- Issue #17915: Fix interoperability of xml.sax with file objects returned by
codecs.open().
-- Issue #16601: Restarting iteration over tarfile no more continues from where
- it left off. Patch by Michael Birtwell.
+- Issue #16601: Restarting iteration over tarfile really restarts rather
+ than continuing from where it left off. Patch by Michael Birtwell.
- Issue #17289: The readline module now plays nicer with external modules
or applications changing the rl_completer_word_break_characters global
--
Repository URL: http://hg.python.org/cpython
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