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A comment on Why Python Is Slow: Looking Under the Hood. Parent comment

Re:Why Python Is Slow: Looking Under the Hood by masklinn on Tuesday November 18, 2014 @03:17PM (#8626062) 

    > pypy -mtimeit 'sum(xrange(1, 100000001))'
    10 loops, best of 3: 153 msec per loop
however the context of TFA is scientific computing, hence pypy being ignored/dismissed
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Re:Why Python Is Slow: Looking Under the Hood by philippeback on Tuesday November 18, 2014 @04:06PM (#8626354)
We can do it this was if needed.

http://clementbera.wordpress.com/2013/06/19/optimizing-pharo...

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Re:Why Python Is Slow: Looking Under the Hood by masklinn on Tuesday November 18, 2014 @04:51PM (#8626587)
Having an FFI is not relevant, Pypy has an excellent FFI already[0].

You can't interface with the existing SciPy ecosystem which expects the CPython API, which is the reason why pypy doesn't matter in scientific computing.

[0] inspired by LuaJIT and usable from both CPython and PyPy: https://cffi.readthedocs.org/en/release-0.8/

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