[Numpy-tickets] [NumPy] #594: Major slowdown when mixing array with Python's list

NumPy numpy-tickets@scipy....
Thu Apr 3 10:25:05 CDT 2008


#594: Major slowdown when mixing array with Python's list
------------------------+---------------------------------------------------
 Reporter:  Boris       |        Owner:  somebody
     Type:  defect      |       Status:  closed  
 Priority:  normal      |    Milestone:  1.0.5   
Component:  numpy.core  |      Version:          
 Severity:  normal      |   Resolution:  invalid 
 Keywords:              |  
------------------------+---------------------------------------------------
Changes (by oliphant):

  * status:  new => closed
  * resolution:  => invalid

Comment:

 This is not a bug.  The poster is concerned about the speed of saying

 {{{
 k = array([1,2,3,4,5])
 }}}

 But, the conversion to an array must be done at some point.  And, yes, it
 must be done in order for the indexing code to work.  You can speed up
 things by specifying the data-type to convert to:

 {{{
 k = array([1,2,3,4,5],int)
 }}}

-- 
Ticket URL: <http://scipy.org/scipy/numpy/ticket/594#comment:4>
NumPy <http://projects.scipy.org/scipy/numpy>
The fundamental package needed for scientific computing with Python.


More information about the Numpy-tickets mailing list