#13394: Write a WeakValueDictionary with safer key removal
-------------------------------+--------------------------------------------
Reporter: nbruin | Owner: rlm
Type: enhancement | Status: new
Priority: major | Milestone: sage-5.4
Component: memleak | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
-------------------------------+--------------------------------------------
Description changed by nbruin:
Old description:
> On ticket #12323 we found that the use of `WeakValueDictionaries` as
> caches can cause `removal` callbacks in rather harsh environments. Normal
> `WeakValueDictionaries` remove keys with dead values by looking up the
> key. This involves Python equality testing on the key, which can cause
> any kind of operation in Sage. We need a dictionary where we can delete
> entries without key comparisons. See below for possible strategies.
New description:
On ticket #12313 we found that the use of `WeakValueDictionaries` as
caches can cause `removal` callbacks in rather harsh environments. Normal
`WeakValueDictionaries` remove keys with dead values by looking up the
key. This involves Python equality testing on the key, which can cause any
kind of operation in Sage. We need a dictionary where we can delete
entries without key comparisons. See below for possible strategies.
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13394#comment:1>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
