#10527: Implementation of quiver mutation type
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       Reporter:  stumpc5                      |         Owner:  sage-combinat
           Type:  enhancement                  |        Status:  needs_review 
       Priority:  major                        |     Milestone:  sage-5.4     
      Component:  combinatorics                |    Resolution:               
       Keywords:  quiver mutation type days38  |   Work issues:               
Report Upstream:  N/A                          |     Reviewers:  Hugh Thomas  
        Authors:  Christian Stump              |     Merged in:               
   Dependencies:                               |      Stopgaps:               
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Comment (by robertwb):

 > Replying to [comment:116 robertwb]:
 > > Lazily importing * is preferred, as it avoids stat'ing a new directory
 and loading two new files (init.py and all.py). All this filesystem
 activity seems to be one of the primary reasons for slow Sage startup time
 (perhaps even more so than the execution of the .py files themselves) and
 if we're going to try to fix that it's important to be careful about what
 continues to be added.
 > > That being said, I have know idea what's up with volker-
 desktop.stp.dias.ie . It's as if the file existed but was
 incomplete/empty. Let's see if that continues to be a problem.
 >
 > Thanks for your comments again. Are you suggesting to lazily importing *
 ? We first did that but the patchbot didn't like it (i.e. some tests
 failed, see Comments [comment:95] and [comment:97] above), that's why we
 then did it another way.

 Yeah, I looked at those patchbot errors and was wondering if they were
 something environmental, 'cause I don't see how they could come up. I
 tried to apply these patches myself to try it out, but I apparently didn't
 have a new enough pre-release. I was thinking of adding a patch to use
 import * again and seeing if the patchbots (after checking my own local
 copy) were still unhappy (and may get around to doing this once I build
 myself a 5.4 alpha, as 5.3rc0 is apparently too old).

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10527#comment:122>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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