#18241: Great speedup in polytopes construction with generic backend
---------------------------+----------------------------
Reporter: vdelecroix | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.7
Component: geometry | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies: #18215
Stopgaps: |
---------------------------+----------------------------
Construction of polytopes with number field coordinates are very slow.
There are several reasons for that:
- quadratic number field element hash is slow (already solved in #18215)
- `NumberField.__cmp__` is slow
- we can avoid many useless copies and recomputation in the algorithm
`Vrep2Hrep` and `Hrep2Vrep`
After applying the branch the speedup is really cool...
Before
{{{
sage: %runfile polyhedron_test.py
sage: %time gr = great_rhombicuboctahedron()
CPU times: user 4.66 s, sys: 24 ms, total: 4.68 s
Wall time: 4.66 s
}}}
After
{{{
sage: %runfile polyhedron_test.py
sage: %time gr = great_rhombicuboctahedron()
CPU times: user 292 ms, sys: 28 ms, total: 320 ms
Wall time: 306 ms
}}}
(But I am still not able to build the
[http://en.wikipedia.org/wiki/600-cell 600-cell])
--
Ticket URL: <http://trac.sagemath.org/ticket/18241>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/d/optout.
