#10733: Faster echelon form code for matrix_modn_sparse
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Reporter: tornaria | Owner: was
Type: enhancement | Status: positive_review
Priority: major | Milestone: sage-4.7
Component: linear algebra | Keywords:
Author: Gonzalo Tornaria | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by tornaria):
I added two more patches to the sequence:
- trac_10733.05: adds a doctest for the case of mod2, because it is using
different code it's worth testing separately
- trac_10733.06: adds a special case to the method for the case when
"switch_density" is 0.
The latter basically implements what I suggested in my last comment as
part of the {{{_echelon_in_place_classical()}}} method. As is now, the
default for "switch_density" is always 0.1 so this code would not be
normally used. But if one explicitly uses "switch_density=0", then the
method will run faster after this patch. And for the case of mod 2, it
seems that it could indeed be faster to use switch_density=0 instead of
the default 0.1.
I guess these two patches need to go back to review, although trac doesn't
give me the option of changing the status to needs_review...
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10733#comment:15>
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