5 ms·

TL;DR: D is faster than Python.

gshulegaard 9y ago
Is it though? Un-optimized Python vs. a D script iterated on 5 times? Certainly eye-catching but I wouldn't call it conclusive.
- faragon 9y ago
  Sure, was for saving time. In my opinion, that article could be more elaborated.
- throwaway7645 9y ago
  No, it isn't debatable which is generally faster (D), but I was impressed that you could just prototype in Python (probably significantly faster than D) and run it through PyPy when you're done and get 90% of the performance of D. Of course Python has the bloat of the interpreter and Jitter, while D is just a binary. Point is I was expecting more speed from D. I'm curious if this is just luck or the two would be neck and neck on a range of tests?
  - gshulegaard 9y ago
    Optimizing/squeezing performance out of Python is a rabbit hole: https://www.ibm.com/developerworks/community/blogs/jfp/entry/A_Comparison_Of_C_Julia_Python_Numba_Cython_Scipy_and_BLAS_on_LU_Factorization?lang=en https://www.ibm.com/developerworks/community/blogs/jfp/entry... I would speculate using numba or Cython would yield further performance gains over PyPy...but that's mostly just based on anecdotal comparisons: https://cardinalpeak.com/blog/faster-python-with-cython-and-pypy-part-2/ https://cardinalpeak.com/blog/faster-python-with-cython-and-... I just think it is a bit dishonest to try and make a claim as pointed as this article's in 2017 by stopping at simply running an un-optimized CPython script with PyPy.
    - throwaway7645 9y ago
      I think they're just giving you bounds on what to expect and not selling anything. The D optimizations looked a lot easier (write it slightly different) than mucking with Cython or Numba. Simply running through PyPy is another thing all together.
      - gshulegaard 9y ago
        I don't know, a lot of benefit can be had from Cython by just declaring types and flagging for compilation: http://cython.readthedocs.io/en/latest/src/tutorial/cython_tutorial.html http://cython.readthedocs.io/en/latest/src/tutorial/cython_t... http://cython.readthedocs.io/en/latest/src/quickstart/cythonize.html http://cython.readthedocs.io/en/latest/src/quickstart/cython... But that is just my opinion.

Is it though? Un-optimized Python vs. a D script iterated on 5 times? Certainly eye-catching but I wouldn't call it conclusive.

faragon 9y ago
Sure, was for saving time. In my opinion, that article could be more elaborated.
throwaway7645 9y ago
No, it isn't debatable which is generally faster (D), but I was impressed that you could just prototype in Python (probably significantly faster than D) and run it through PyPy when you're done and get 90% of the performance of D. Of course Python has the bloat of the interpreter and Jitter, while D is just a binary. Point is I was expecting more speed from D. I'm curious if this is just luck or the two would be neck and neck on a range of tests?
- gshulegaard 9y ago
  Optimizing/squeezing performance out of Python is a rabbit hole: https://www.ibm.com/developerworks/community/blogs/jfp/entry/A_Comparison_Of_C_Julia_Python_Numba_Cython_Scipy_and_BLAS_on_LU_Factorization?lang=en https://www.ibm.com/developerworks/community/blogs/jfp/entry... I would speculate using numba or Cython would yield further performance gains over PyPy...but that's mostly just based on anecdotal comparisons: https://cardinalpeak.com/blog/faster-python-with-cython-and-pypy-part-2/ https://cardinalpeak.com/blog/faster-python-with-cython-and-... I just think it is a bit dishonest to try and make a claim as pointed as this article's in 2017 by stopping at simply running an un-optimized CPython script with PyPy.
  - throwaway7645 9y ago
    I think they're just giving you bounds on what to expect and not selling anything. The D optimizations looked a lot easier (write it slightly different) than mucking with Cython or Numba. Simply running through PyPy is another thing all together.
    - gshulegaard 9y ago
      I don't know, a lot of benefit can be had from Cython by just declaring types and flagging for compilation: http://cython.readthedocs.io/en/latest/src/tutorial/cython_tutorial.html http://cython.readthedocs.io/en/latest/src/tutorial/cython_t... http://cython.readthedocs.io/en/latest/src/quickstart/cythonize.html http://cython.readthedocs.io/en/latest/src/quickstart/cython... But that is just my opinion.