mirror of https://github.com/python/cpython
Make CPython PEP summary entry links consistent, add pep 456 discussion.
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@ -123,9 +123,9 @@ Significantly Improved Library Modules:
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CPython implementation improvements:
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* :ref:`PEP 442: Safe object finalization <pep-442>`
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* :ref:`PEP 445: Configurable memory allocators <pep-445>`
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* :pep:`456` Secure and interchangeable hash algorithm
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* :pep:`442`: :ref:`Safe object finalization <whatsnew-pep-442>`
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* :pep:`445`: :ref:`Configurable memory allocators <whatsnew-pep-445>`
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* :pep:`456`: :ref:`Secure and interchangeable hash algorithm <whatsnew-pep-456>`
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* Improve finalization of Python modules to avoid setting their globals
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to None, in most cases (:issue:`18214`).
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* A more efficient :mod:`marshal` format (:issue:`16475`).
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@ -909,7 +909,7 @@ CPython Implementation Changes
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==============================
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.. _pep-445:
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.. _whatsnew-pep-445:
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PEP 445: Customization of CPython memory allocators
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---------------------------------------------------
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@ -923,7 +923,7 @@ the CPython interpreter.
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PEP written and implemented by Victor Stinner.
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.. _pep-442:
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.. _whatsnew-pep-442:
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PEP 442: Safe object finalization
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---------------------------------
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@ -943,6 +943,25 @@ on the normal operation of the cyclic garbage collector.
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PEP written and implemented by Antoine Pitrou.
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.. _whatsnew-pep-456:
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PEP 456: Secure and Interchangeable Hash Algorithm
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--------------------------------------------------
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:pep:`456` follows up on earlier security fix work done on Python's hash
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algorithm to address certain DOS attacks to which public facing APIs backed by
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dictionary lookups may be subject. (See :issue:`14621` for the start of the
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current round of improvements.) The PEP unifies CPython's hash code to make it
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easier for a packager to substitute a different hash algorithm, and switches
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Python's default implementation to a SipHash implementation on platforms that
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have a 64 bit data type. Any performance differences in comparison with the
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older FNV algorithm are trivial.
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The PEP adds additional fields to the :func:`sys.hash_info` struct sequence to
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describe the hash algorithm in use by the currently executing binary. Otherwise,
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the PEP does not alter any existing CPython APIs.
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Other build and C API changes
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-----------------------------
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