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Publicize 3.1-specific performance enhancements

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Antoine Pitrou 2009-03-28 19:45:26 +00:00
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Doc/whatsnew/3.1.rst
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@ -112,3 +112,27 @@ Some smaller changes made to the core Python language are:
.. ======================================================================
Optimizations
-------------
Major performance enhancements have been added:
* The new I/O library (as defined in :pep:`3116`) was mostly written in
Python and quickly proved to be a problematic bottleneck in Python 3.0.
In Python 3.1, the I/O library has been entirely rewritten in C and is
2 to 20 times faster depending on the task at hand. The pure Python
version is still available for experimentation purposes through
the ``_pyio`` module.
(Contributed by Amaury Forgeot d'Arc and Antoine Pitrou.)
* A new configure flag, ``--with-computed-gotos``, enables a faster opcode
dispatch mechanism on compilers which support it. Speedups of up to 20%
have been observed, depending on the system and compiler.
(Contributed by Antoine Pitrou, :issue:`4753`.)
.. ======================================================================