[Numpy-discussion] identity

Keith Goodman kwgoodman@gmail....
Wed Aug 12 12:02:43 CDT 2009


On Wed, Aug 12, 2009 at 8:53 AM, Charles R
Harris<charlesr.harris@gmail.com> wrote:
>
>
> On Wed, Aug 12, 2009 at 9:29 AM, Scott Sinclair
> <scott.sinclair.za@gmail.com> wrote:
>>
>> >2009/8/12 Keith Goodman <kwgoodman@gmail.com>:
>> > On Wed, Aug 12, 2009 at 7:24 AM, Keith Goodman<kwgoodman@gmail.com>
>> > wrote:
>> >> On Wed, Aug 12, 2009 at 1:31 AM, Lars
>> >> Bittrich<lars.bittrich@googlemail.com> wrote:
>> >>>
>> >>> a colleague made me aware of a speed issue with numpy.identity. Since
>> >>> he was
>> >>> using numpy.diag(numpy.ones(N)) before, he expected identity to be at
>> >>> least as
>> >>> fast as diag. But that is not the case.
>> >>>
>> >>> We found that there was a discussion on the list (July, 20th; "My
>> >>> identity" by
>> >>> Keith Goodman). The presented solution was much faster. Someone
>> >>> wondered if
>> >>> the change was already made in the svn.
>> >>
>> >> Things tend to get lost on the mailing list. The next step would be to
>> >> file a ticket on the numpy trac. (I've never done that) That would
>> >> increase the chance of someone important taking a look at it.
>> >
>> > Here's the ticket:
>> >
>> > http://projects.scipy.org/numpy/ticket/1193
>> >
>>
>> A patch against recent SVN trunk is attached to the ticket. Please
>> review...
>
> Already done. Thanks.

Hey, thanks.

Now I know how to do the first two steps:

(1) Extend the work of others (in this case Luca Citi and Robert Kern)
(2) File a ticket
(3) ???
(4) Profit


More information about the NumPy-Discussion mailing list