#715: Parents probably not reclaimed due to too much caching
------------------------+---------------------------------------------------
Reporter: robertwb | Owner: somebody
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.8
Component: coercion | Keywords: weak cache coercion
Work_issues: | Upstream: N/A
Reviewer: | Author: Simon King
Merged: | Dependencies: #9138, #11900
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Changes (by SimonKing):
* cc: robertwb (added)
Comment:
At [http://groups.google.com/group/sage-
devel/browse_thread/thread/8b2fba49fe1ee69e sage-devel], Robert Bradshaw
suggested the following benchmark, measuring the impact of the new
`TripleDict` on multiplication of integers with `RDF` (which does involve
actions and thus does involve lookup in `TripleDict`):
{{{
sage: def test(n):
....: a = Integer(10)
....: b = QQ(20)
....: s = RDF(30)
....: for x in xrange(10**n):
....: s += a*b*x
....:
}}}
With Sage-5.0.prealpha0+#11780:
{{{
sage: %time test(6)
CPU times: user 7.25 s, sys: 0.04 s, total: 7.29 s
Wall time: 7.31 s
}}}
and with the patch from here added
{{{
sage: %time test(6)
CPU times: user 7.29 s, sys: 0.01 s, total: 7.31 s
Wall time: 7.31 s
}}}
So, yet another supporting data point!
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/715#comment:137>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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