[Numpy-discussion] Accelerate or OpenBLAS for numpy / scipy wheels?

[Matthew Brett]

Hi,

On Tue, Jun 28, 2016 at 5:25 AM, Charles R Harris
<charlesr.harris at gmail.com> wrote:
>
>
> On Mon, Jun 27, 2016 at 9:46 PM, Matthew Brett <matthew.brett at gmail.com>
> wrote:
>>
>> Hi,
>>
>> I just succeeded in getting an automated dual arch build of numpy and
>> scipy, using OpenBLAS.  See the last three build jobs in these two
>> build matrices:
>>
>> https://travis-ci.org/matthew-brett/numpy-wheels/builds/140388119
>> https://travis-ci.org/matthew-brett/scipy-wheels/builds/140684673
>>
>> Tests are passing on 32 and 64-bit.
>>
>> I didn't upload these to the usual Rackspace container at
>> wheels.scipy.org to avoid confusion.
>>
>> So, I guess the question now is - should we switch to shipping
>> OpenBLAS wheels for the next release of numpy and scipy?  Or should we
>> stick with the Accelerate framework that comes with OSX?
>>
>> In favor of the Accelerate build : faster to build, it's what we've
>> been doing thus far.
>>
>> In favor of OpenBLAS build : allows us to commit to one BLAS / LAPACK
>> library cross platform, when we have the Windows builds working.
>> Faster to fix bugs with good support from main developer.  No
>> multiprocessing crashes for Python 2.7.
>
>
> I'm still a bit nervous about OpenBLAS, see
> https://github.com/scipy/scipy/issues/6286. That was with version 0.2.18,
> which is pretty recent.

Well - we are committed to OpenBLAS already for the Linux wheels, so
if that failure was due to an error in OpenBLAS, we'll have to report
it and get it fixed / fix it ourselves upstream.

Cheers,

Matthew