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Document latest optimizations using _PyBytesWriter

This commit is contained in:
Victor Stinner 2015-10-14 10:10:00 +02:00
parent 772b2b09f2
commit ebcf9edc05
2 changed files with 17 additions and 4 deletions
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17
Doc/whatsnew/3.6.rst
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@ -141,16 +141,25 @@ Optimizations
=============
* The ASCII decoder is now up to 60 times as fast for error handlers:
``surrogateescape``, ``ignore`` and ``replace``.
``surrogateescape``, ``ignore`` and ``replace`` (Contributed
by Victor Stinner in :issue:`24870`).
* The ASCII and the Latin1 encoders are now up to 3 times as fast for the error
error ``surrogateescape``.
error ``surrogateescape`` (Contributed by Victor Stinner in :issue:`25227`).
* The UTF-8 encoder is now up to 75 times as fast for error handlers:
``ignore``, ``replace``, ``surrogateescape``, ``surrogatepass``.
``ignore``, ``replace``, ``surrogateescape``, ``surrogatepass`` (Contributed
by Victor Stinner in :issue:`25267`).
* The UTF-8 decoder is now up to 15 times as fast for error handlers:
``ignore``, ``replace`` and ``surrogateescape``.
``ignore``, ``replace`` and ``surrogateescape`` (Contributed
by Victor Stinner in :issue:`25301`).
* ``bytes % args`` is now up to 2 times faster. (Contributed by Victor Stinner
in :issue:`25349`).
* ``bytearray % args`` is now between 2.5 and 5 times faster. (Contributed by
Victor Stinner in :issue:`25399`).
Build and C API Changes

4
Misc/NEWS
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@ -10,6 +10,9 @@ Release date: XXXX-XX-XX
Core and Builtins
-----------------
- Issue #25399: Optimize bytearray % args using the new private _PyBytesWriter
API. Formatting is now between 2.5 and 5 times faster.
- Issue #25274: sys.setrecursionlimit() now raises a RecursionError if the new
recursion limit is too low depending at the current recursion depth. Modify
also the "lower-water mark" formula to make it monotonic. This mark is used
@ -19,6 +22,7 @@ Core and Builtins
sys.stdout.fileno() fails.
- Issue #25349: Optimize bytes % args using the new private _PyBytesWriter API.
Formatting is now up to 2 times faster.
- Issue #24806: Prevent builtin types that are not allowed to be subclassed from
being subclassed through multiple inheritance.