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There are two blog posts as of why: http://morepypy.blogspot.com/2011/05/numpy-in-pypy-status-and-roadmap.html http://morepypy.blogspot.com/2011/05/numpy-in-py

by fijal 15y ago

There are two blog posts as of why: http://morepypy.blogspot.com/2011/05/numpy-in-pypy-status-and-roadmap.html http://morepypy.blogspot.com/2011/05/numpy-in-pypy-status-an... http://morepypy.blogspot.com/2011/05/numpy-follow-up.html http://morepypy.blogspot.com/2011/05/numpy-follow-up.html It's not possible to do cool stuff with reusing - like parallelizing expressions etc. The architecture as it is now already can score 2x wins over original numpy with array expressions and we expect it to get only better with SSE and more parallelizing. This requires reimplementing numpy.

cdavid 15y ago
This is again a different argument. I understand it is more fun, more rewarding and more challenging to implement a new array module on top of pypy. But it is seriously doubtful that it is the best way forward to make pypy usable for libraries which depend on numpy.