#14073: Cache a bounded number of recently-created parents.
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       Reporter:  robertwb         |         Owner:  rlm     
           Type:  enhancement      |        Status:  new     
       Priority:  major            |     Milestone:  sage-5.7
      Component:  memleak          |    Resolution:          
       Keywords:                   |   Work issues:          
Report Upstream:  N/A              |     Reviewers:          
        Authors:  Robert Bradshaw  |     Merged in:          
   Dependencies:                   |      Stopgaps:          
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Comment (by robertwb):

 Replying to [comment:2 nbruin]:
 > Apart from fixing `len(recently_created)` at compile-time this may well
 be a good idea.

 len(list) is really fast, much faster than creating a parent, and allows
 our list to possibly grow or shrink in the future.

 > Main objections:
 >  - It will make debugging that much harder. Given that doctests are
 small, the parent deletion code will hardly be exercised.
 >  - Do we have good use-cases that show clear benefit from this approach?
 Given that the frequency of garbage collection in python is rather low,
 I'd expect that parents will relatively often still be around if they are
 required soon after deletion.

 I actually agree with both of these objections; I don't think this code
 should go in unless it's clearly shown to be a problem.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14073#comment:3>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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