#13949: Make mutability on matrices a simple bint flag
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Reporter: nbruin | Owner: tbd
Type: PLEASE CHANGE | Status: new
Priority: major | Milestone: sage-5.6
Component: PLEASE CHANGE | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Comment (by nbruin):
Replying to [comment:1 nbruin]:
> - Would it be a good idea to also allow `None` as a sentinel value
there and that any routine that needs `_cache` replaces `None` there by an
empty dictionary? Or is that an unacceptable cost for cache use?
In fact, that's already in place in the cache access routines! It's just
the __init__ method that insists on setting `self._cache = {}`. It simply
shouldn't do that! That will be much more efficient.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13949#comment:2>
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