diff options
| -rw-r--r-- | Doc/whatsnew/3.4.rst | 85 |
1 files changed, 43 insertions, 42 deletions
diff --git a/Doc/whatsnew/3.4.rst b/Doc/whatsnew/3.4.rst index 3be7b92..9f95fdc 100644 --- a/Doc/whatsnew/3.4.rst +++ b/Doc/whatsnew/3.4.rst @@ -937,48 +937,6 @@ Add a filter function to ignore some packages (tests for instance), (Contributed by Christian Tismer in :issue:`19274`.) -Other improvements -================== - -* Tab-completion is now enabled by default in the interactive interpreter. - (Contributed by Antoine Pitrou and Éric Araujo in :issue:`5845`.) - -* Invoking the Python interpreter with ``--version`` now outputs the version to - standard output instead of standard error (:issue:`18338`). Similar changes - were made to :mod:`argparse` (:issue:`18920`) and other modules that have - script-like invocation capabilities (:issue:`18922`). - -Optimizations -============= - -Major performance enhancements have been added: - -* The UTF-32 decoder is now 3x to 4x faster. - -* The cost of hash collisions for sets is now reduced. Each hash table - probe now checks a series of consecutive, adjacent key/hash pairs before - continuing to make random probes through the hash table. This exploits - cache locality to make collision resolution less expensive. - - The collision resolution scheme can be described as a hybrid of linear - probing and open addressing. The number of additional linear probes - defaults to nine. This can be changed at compile-time by defining - LINEAR_PROBES to be any value. Set LINEAR_PROBES=0 to turn-off - linear probing entirely. - - (Contributed by Raymond Hettinger in :issue:`18771`.) - -* The interpreter starts about 30% faster. A couple of measures lead to the - speedup. The interpreter loads fewer modules on startup, e.g. the :mod:`re`, - :mod:`collections` and :mod:`locale` modules and their dependencies are no - longer imported by default. The marshal module has been improved to load - compiled Python code faster. - - (Contributed by Antoine Pitrou, Christian Heimes and Victor Stinner in - :issue:`19219`, :issue:`19218`, :issue:`19209`, :issue:`19205` and - :issue:`9548`) - - CPython Implementation Changes ============================== @@ -1067,6 +1025,49 @@ Changes to Python's build process and to the C API include: be made available as a public API for third party use in Python 3.4. +Other improvements +================== + +* Tab-completion is now enabled by default in the interactive interpreter. + (Contributed by Antoine Pitrou and Éric Araujo in :issue:`5845`.) + +* Invoking the Python interpreter with ``--version`` now outputs the version to + standard output instead of standard error (:issue:`18338`). Similar changes + were made to :mod:`argparse` (:issue:`18920`) and other modules that have + script-like invocation capabilities (:issue:`18922`). + + +Optimizations +============= + +Major performance enhancements have been added: + +* The UTF-32 decoder is now 3x to 4x faster. + +* The cost of hash collisions for sets is now reduced. Each hash table + probe now checks a series of consecutive, adjacent key/hash pairs before + continuing to make random probes through the hash table. This exploits + cache locality to make collision resolution less expensive. + + The collision resolution scheme can be described as a hybrid of linear + probing and open addressing. The number of additional linear probes + defaults to nine. This can be changed at compile-time by defining + LINEAR_PROBES to be any value. Set LINEAR_PROBES=0 to turn-off + linear probing entirely. + + (Contributed by Raymond Hettinger in :issue:`18771`.) + +* The interpreter starts about 30% faster. A couple of measures lead to the + speedup. The interpreter loads fewer modules on startup, e.g. the :mod:`re`, + :mod:`collections` and :mod:`locale` modules and their dependencies are no + longer imported by default. The marshal module has been improved to load + compiled Python code faster. + + (Contributed by Antoine Pitrou, Christian Heimes and Victor Stinner in + :issue:`19219`, :issue:`19218`, :issue:`19209`, :issue:`19205` and + :issue:`9548`) + + Deprecated ========== |