#15367: Empty lists while creating parents
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Reporter: roed | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-5.13
Component: memleak | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by SimonKing):
Next findings:
- `MonoDict` does not get resized often, and during doctests of
sage.schemes, the resize happens at a maximal size of 1118 items
- `TripleDict` is resized more often. A size of 1277 is not uncommon, and
maximally I see a resize happening with 5125 items.
Anyway, I am not sure if these figures are hinting something.
Do I understand correctly: Your suggestion is to start with a list (an
actual initialised list) of buckets, but initially each bucket will be
`None` rather than `[]`. Hence, if the hash makes us choose a bucket that
is None, then we immediately know that an item with this key hash does not
exist yet, and we may either create a new bucket (if we want to add a new
item) or immediately raise a `KeyError` (if we want to get an item).
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Ticket URL: <http://trac.sagemath.org/ticket/15367#comment:10>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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