#11900: Serious regression caused by #9138
----------------------------+-----------------------------------------------
   Reporter:  SimonKing     |          Owner:  tbd                  
       Type:  defect        |         Status:  needs_work           
   Priority:  major         |      Milestone:  sage-4.7.3           
  Component:  performance   |       Keywords:  categories regression
Work_issues:  fix doctests  |       Upstream:  N/A                  
   Reviewer:                |         Author:  Simon King           
     Merged:                |   Dependencies:  #9138 #11911         
----------------------------+-----------------------------------------------

Comment(by SimonKing):

 Not good. I got numerous doctest errors.

 While it seems that postponing coercion from the base ring was good idea
 for matrix spaces (see first patch), it seems that the new coercion model
 for libsingular rings has no effect on the performance. So, I tend to
 leave that for a different ticket and try to simplify my patches.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11900#comment:55>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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