#11115: Rewrite cached_method in Cython
---------------------------+------------------------------------------------
Reporter: SimonKing | Owner: jason
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-4.7
Component: misc | Keywords: category cython cache
Author: Simon King | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by SimonKing):
I just updated the patch, because I noticed the following: If you have an
old pickle of an object with a cached method then of course the pickle
will contain the cached value. If you unpickle then it may be that an old
`CachedMethodCaller` becomes a new `CachedMethodCallerNoArgs`.
It would thus be nice if `CachedMethodCallerNoArgs` could retrieve the
cache value of an old pickled `CachedMethodCaller`. This is implemented in
the new patch.
What I did to test it:
1. Without the patch applied, do
{{{
sage: P.<a,b,c,d> = QQ[]
sage: I = P*[a,b]
sage: I.gens() # this is in order to fill the cache - it is a
CachedMethodCaller
sage: save(I,'pickletest')
}}}
2. With the patch applied, do
{{{
sage: I = load('pickletest')
sage: I.gens.cache # this is now a CachedMethodCallerNoArgs
[a, b]
}}}
So, the cache is already filled after unpickling.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11115#comment:14>
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