[Numpy-discussion] Numpy and PEP 343
oliphant at ee.byu.edu
Fri Mar 3 09:54:05 CST 2006
Tim Hochberg wrote:
> Travis Oliphant wrote:
>> David M. Cooke wrote:
>>> I couldn't leave it at that :-), so I wrote my bytecode idea up.
>> I like what you've done. It makes me wonder what could be done with
>> just a Python-level solution (that might be easier to generalize to
>> more data-types and operators).
> I tried hand coding stuff at the pure Python level to see how close I
> could come to David's results. I performed the operations in chunks
> (larger chunks than he did so that Python overhead didn't kill me) For
> the second case he presents (2*a+3*b), I managed to get a 70% speedup.
> While not negligible, it's a far cry from the 180% speedup I saw with
> David's code for the same result. So while doing things at the Python
> level would certainly be easier, the payoff isn't likely to be nearly
> as big.
That's good information. Still, it might be useful for more
general-operators and data-types to have something that does essentially
this in Python only.
Then, if you have a simpler expression with a few select data-types you
could have the big-speed up with something more specific.
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