#20751: Check easy invariants first for simplicial complex isomorphism
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Reporter: tscrim | Owner: tscrim
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-7.3
Component: algebraic | Resolution:
topology | Merged in:
Keywords: days74 | Reviewers:
Authors: Travis Scrimshaw | Work issues:
Report Upstream: N/A | Commit:
Branch: | fbe4c3df5d54c56812bb09b01f76826b6d7a7226
public/simplicial_complex/check_easy_invariants-20751| Stopgaps:
Dependencies: #20720 |
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Comment (by jhpalmieri):
I think the initial checks can slow things down. Actually, if two
complexes are not isomorphic for "obvious" reasons, it is now much faster
(by a factor of 40 on my machine) to check that they are not, but if they
are actually isomorphic, it is slower (by a factor of 2) to check that.
For these timings, I used the complexes `Z1`, `Z2`, `Z3` from the
doctests, and ran
{{{
%timeit Z1.is_isomorphic(Z2) # True
%timeit Z1.is_isomorphic(Z3) # False
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/20751#comment:6>
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