#15104: Special case modn_dense matrix operations to improve performance
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Reporter: nbruin | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.2
Component: linear algebra | Resolution:
Keywords: | Merged in:
Authors: Nils Bruin, Simon | Reviewers:
King | Work issues: regression in
Report Upstream: N/A | right_kernel_matrix
Branch: | Commit:
u/SimonKing/ticket/15104 | 0f008f9266e3ed6fbd67e7f3d357474825bdb160
Dependencies: | Stopgaps:
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Comment (by SimonKing):
The following should show the effect of properly caching the vector space
category:
{{{
sage: M=matrix(GF(5),6,6,range(36))
sage: %timeit M.right_kernel_matrix(basis='computed') # category is
repeatedly computed
1000 loops, best of 3: 377 us per loop
sage: N=random_matrix(GF(5),10,7) # this somehow triggers a proper
caching
sage: %timeit M.right_kernel_matrix(basis='computed') # much faster with
proper caching
10000 loops, best of 3: 190 us per loop
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/15104#comment:26>
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