#16296: Speed improvements for categories with axioms
-------------------------------------+-------------------------------------
       Reporter:  SimonKing          |        Owner:
           Type:  enhancement        |       Status:  new
       Priority:  major              |    Milestone:  sage-6.3
      Component:  categories         |   Resolution:
       Keywords:  cython             |    Merged in:
  performance categories             |    Reviewers:
        Authors:                     |  Work issues:
Report Upstream:  N/A                |       Commit:
         Branch:                     |  2ca07873a91cf6d5e685ed3527a314944a8fdfb9
  u/SimonKing/ticket/16296           |     Stopgaps:
   Dependencies:  #10963, #15801,    |
  #16309                             |
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Comment (by SimonKing):

 Replying to [comment:30 nthiery]:
 > On the other hand, I am wondering whether the current not so massive
 > speed improvements make a compelling case for actually cythonizing the
 > file category.py right now. The point is that cythonizing makes the
 > code much harder to debug

 Even if it is a Python class defined in a Cython file? I thought that
 problems will only start if things are cdef.

 > I fear that it would similarly slow down the followup development we
 > want to do with categories, e.g. improving the join algorithm.
 >
 > What do you think?

 Actually improving the join algorithm speed-wise is my main goal for this
 ticket. I am not sure if much progress can be achieved without Cython.

 I'd say: I try to improve the speed as much as possible by as much Cython
 as needed. In a second step, we can see if some of it can also be done in
 Python, or if some parts can be moved to a Cython file separate from
 `sage.categories.category`.

--
Ticket URL: <http://trac.sagemath.org/ticket/16296#comment:31>
Sage <http://www.sagemath.org>
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