#11900: Serious regression caused by #9138
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   Reporter:  SimonKing                                         |          
Owner:  tbd                  
       Type:  defect                                            |         
Status:  needs_work           
   Priority:  critical                                          |      
Milestone:  sage-4.8             
  Component:  performance                                       |       
Keywords:  categories regression
Work_issues:  Laurent series rings are fields. CFF is a field.  |       
Upstream:  N/A                  
   Reviewer:  Jeroen Demeyer, Nicolas M. ThiƩry                 |         
Author:  Simon King           
     Merged:                                                    |   
Dependencies:  #9138 #11911         
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Comment(by SimonKing):

 Replying to [comment:152 SimonKing]:
 > I am now trying whether using the meet (and caching the meet) helps.

 It seems that it doesn't make things faster.

 Anyway. I am now running doctests for the version that uses the meet. If
 there are non-trivial errors then I'll postpone it. Otherwise, I'll
 include it in the patch here.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11900#comment:153>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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