What’s new in PyPy2.7 5.9¶
In previous versions of PyPy,
instance.method would return always
the same bound method object, when gotten out of the same instance (as
id() can tell). CPython doesn’t do that. Now
PyPy, like CPython, returns a different bound method object every time.
type.method, PyPy2 still returns always the same unbound
method object; CPython does it for built-in types but not for
cffi-* branches are part of the upgrade to cffi 1.11.
Indexing into char* behaves differently than CPython
Improve and fix issues with vmprof
CPyext PyListObject.pop must return the value
obj.__dict__['__hash__'] to None
The former is now an external package installable with
pip install cppyy.
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.
bytearray performance (backported from py3.5)
Fix the bounds in the GC when allocating a lot of objects with finalizers, fixes issue #2590
Small improvement to optimize list accesses with constant indexes better by throwing away information about them less eagerly.
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.
Add support for leakfinder in cpyext tests (disabled for now, due to too many failures).
_swappedbytes_ support for
Convert many Py*_Check cpyext functions into macros, like CPython.
Explicitly use Py_ssize_t as the Signed type in pypy c-api
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)