[Cython] Cython 0.16

[mark florisson]

We can now pass a chunksize argument into prange:
https://github.com/cython/cython/commit/5c3e77d3c70686fedd5619d7267728fc819b4c60

On 29 October 2011 14:14, mark florisson <markflorisson88 at gmail.com> wrote:
> Before we do a release, would anyone be opposed to a 'chunksize'
> keyword argument to prange()? That may have significant performance
> impacts.
>
> On 29 October 2011 12:41, mark florisson <markflorisson88 at gmail.com> wrote:
>> Hm ok I'll disable them then. Pointers and some other dtypes are also
>> not supported yet. As for the documentation, have you guys reviewed
>> the documentation for fused types and memoryviews? For instance this
>> is the introduction for memoryviews:
>>
>> "
>> Typed memoryviews can be used for efficient access to buffers. It is
>> similar to the current buffer support, but has more features and
>> cleaner syntax. A memoryview can be used in any context (function
>> parameters, module-level, cdef class attribute, etc) and can be
>> obtained from any object that exposes the PEP 3118 buffer interface.
>> "
>>
>> but I'm not sure this new functionality won't confuse users of the old
>> buffer support.
>>
>> For fused types, cython.numeric only includes long, double and double
>> complex. I think that should be changed to short, int, long, float,
>> double, float complex and double complex. I was deliberately avoiding
>> long long and long double as they (if not used as a base type) would
>> be preferred over the others and may be a lot slower. But then, such
>> usage wouldn't be very useful. Should I include them then?
>>
>> On 29 October 2011 10:30, Dag Sverre Seljebotn
>> <d.s.seljebotn at astro.uio.no> wrote:
>>> Re b), it would be better to disable object dtypes (or emit a warning about
>>> the possible bug when using them) than to delay the release. Object
>>> memoryviews are rare in the first place, and those who contain themselves
>>> should be very rare.
>>> --
>>> Sent from my Android phone with K-9 Mail. Please excuse my brevity.
>>>
>>> Robert Bradshaw <robertwb at math.washington.edu> wrote:
>>>>
>>>> On Fri, Oct 28, 2011 at 1:59 PM, mark florisson
>>>> <markflorisson88 at gmail.com> wrote: > On 28 October 2011 21:55, Robert
>>>> Bradshaw <robertwb at math.washington.edu> wrote: >> With Mark's fused types
>>>> and memory views going in, I think it's about >> time for a new release.
>>>> Thoughts? Anyone want to volunteer to take up >> the process? >> >> - Robert
>>>> >>
>>>> ________________________________
>>>> >> cython-devel mailing list >> cython-devel at python.org >>
>>>> >> http://mail.python.org/mailman/listinfo/cython-devel >> > > That'd be cool.
>>>> >> However there are a few outstanding issues: >    a) the compiler is somewhat
>>>> >> slower (possible solution: lazy utility codes) Yeah, I forgot about that.
>>>> >> This should get resolved. Lazy utility codes (perhaps breaking them up)
>>>> >> would probably got us most of the way there. Long term, I really like the
>>>> >> "declaration caching" idea which could be used for users .pxd files as well
>>>> >> as internally. >    b) there's a potential memory leak problem for
>>>> >> memoryviews with > object dtype that contain themselves, this still needs
>>>> >> investigation. I think this could be mentioned as a caviat rather than being
>>>> >> a blocker. > As for a), Stefan mentioned code spending a lot of time in sub.
>>>> >> > Stefan, could you post the code for this that made Cython compile very >
>>>> >> slowly? >
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>>
>