#11900: Serious regression caused by #9138
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Reporter: SimonKing | Owner: tbd
Type: defect | Status: new
Priority: blocker | Milestone: sage-4.7.2
Component: performance | Keywords: categories regression
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Comment(by SimonKing):
When I use strong references for caching matrix spaces (in addition to the
previous changes), I get
{{{
sage: E = J0(46).endomorphism_ring()
sage: %time g = E.gens()
CPU times: user 6.15 s, sys: 0.16 s, total: 6.31 s
Wall time: 6.33 s
}}}
Of course, one wouldn't like to have all the matrix spaces hanging around.
But perhaps it is an option to temporarily turn garbage collection off.
However, the computation of `E.gens()` actually requires the construction
of many ''different'' matrix spaces. So, making matrix space creation
faster certainly is the best option.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11900#comment:7>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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