[Numpy-tickets] [NumPy] #595: sum function slow

NumPy numpy-tickets@scipy....
Tue Oct 23 21:43:04 CDT 2007


#595: sum function slow
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 Reporter:  Boris       |        Owner:  somebody
     Type:  defect      |       Status:  new     
 Priority:  normal      |    Milestone:  1.0.4   
Component:  numpy.core  |      Version:  none    
 Severity:  normal      |   Resolution:          
 Keywords:              |  
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Comment (by oliphant):

 The dot product uses ATLAS, where-as the sum does not (it uses the reduce
 method of the add ufunc).

 To "fix" this would require using SIMD instructions in some inner loops.
 This is on the list of TODO for NumPy, but may not happen for 1.0.4

-- 
Ticket URL: <http://scipy.org/scipy/numpy/ticket/595#comment:3>
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