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|
=========================
What's new in PyPy2.7 5.9
=========================
.. this is a revision shortly after release-pypy2.7-v5.8.0
.. startrev: 558bd00b3dd8
In previous versions of PyPy, ``instance.method`` would return always
the same bound method object, when gotten out of the same instance (as
far as ``is`` and ``id()`` can tell). CPython doesn't do that. Now
PyPy, like CPython, returns a different bound method object every time.
For ``type.method``, PyPy2 still returns always the same *unbound*
method object; CPython does it for built-in types but not for
user-defined types.
.. branch: cffi-complex
.. branch: cffi-char16-char32
The two ``cffi-*`` branches are part of the upgrade to cffi 1.11.
.. branch: ctypes_char_indexing
Indexing into char* behaves differently than CPython
.. branch: vmprof-0.4.8
Improve and fix issues with vmprof
.. branch: issue-2592
CPyext PyListObject.pop must return the value
.. branch: cpyext-hash_notimpl
If ``tp_hash`` is ``PyObject_HashNotImplemented``, set ``obj.__dict__['__hash__']`` to None
.. branch: cppyy-packaging
Renaming of ``cppyy`` to ``_cppyy``.
The former is now an external package installable with ``pip install cppyy``.
.. branch: Enable_PGO_for_clang
.. branch: nopax
At the end of translation, run ``attr -q -s pax.flags -V m`` on
PAX-enabled systems on the produced binary. This seems necessary
because PyPy uses a JIT.
.. branch: pypy_bytearray
Improve ``bytearray`` performance (backported from py3.5)
.. branch: gc-del-limit-growth
Fix the bounds in the GC when allocating a lot of objects with finalizers,
fixes issue #2590
.. branch: arrays-force-less
Small improvement to optimize list accesses with constant indexes better by
throwing away information about them less eagerly.
.. branch: getarrayitem-into-bridges
More information is retained into a bridge: knowledge about the content of
arrays (at fixed indices) is stored in guards (and thus available at the
beginning of bridges). Also, some better feeding of information about known
fields of constant objects into bridges.
.. branch: cpyext-leakchecking
Add support for leakfinder in cpyext tests (disabled for now, due to too many
failures).
.. branch: pypy_swappedbytes
Added ``_swappedbytes_`` support for ``ctypes.Structure``
.. branch: pycheck-macros
Convert many Py*_Check cpyext functions into macros, like CPython.
.. branch: py_ssize_t
Explicitly use Py_ssize_t as the Signed type in pypy c-api
.. branch: cpyext-jit
Differentiate the code to call METH_NOARGS, METH_O and METH_VARARGS in cpyext:
this allows to write specialized code which is much faster than previous
completely generic version. Moreover, let the JIT to look inside the cpyext
module: the net result is that cpyext calls are up to 7x faster. However, this
is true only for very simple situations: in all real life code, we are still
much slower than CPython (more optimizations to come)
|
