On 07/04/15 01:49, Nathaniel Smith wrote:

> Any opinions, objections?

Accelerate does not break multiprocessing, quite the opposite. The bug 
is in multiprocessing and has been fixed in Python 3.4.

My vote would nevertheless be for OpenBLAS if we can use it without 
producing test failures in NumPy and SciPy.

Most of the test failures with OpenBLAS and Carl Kleffner's toolchain on 
Windows are due to differences between Microsoft and MinGW runtime 
libraries and not due to OpenBLAS itself. These test failures are not 
relevant on Mac.

ATLAS can easily reduce the speed of a matrix product or a linear 
algebra call with a factor of 20 compared to Accelerate, MKL or 
OpenBLAS. It would give us bad karma.


Sturla




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