#19585: Improve efficiency of calling GAP functions
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Reporter: jaanos | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.10
Component: interfaces | Resolution:
Keywords: GAP functions | Merged in:
interface | Reviewers:
Authors: Janoš Vidali | Work issues:
Report Upstream: N/A | Commit:
Branch: | 62bd5710559065d03a64aed7b8611cdc6842b278
u/jaanos/improve_efficiency_of_calling_gap_functions| Stopgaps:
Dependencies: |
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Changes (by tscrim):
* cc: vbraun (added)
Comment:
This does not appear to be a universal speedup. With branch:
{{{
sage: P = groups.permutation.Symmetric(7)
sage: %time S = P.conjugacy_classes_subgroups()
CPU times: user 432 ms, sys: 44 ms, total: 476 ms
Wall time: 507 ms
sage: P = groups.matrix.GL(3, 3)
sage: %timeit P.conjugacy_classes_representatives()
1000 loops, best of 3: 1.08 ms per loop
sage: P = groups.permutation.Suzuki(8)
sage: P.cardinality()
29120
sage: %time S = P.conjugacy_classes_subgroups()
CPU times: user 115 ms, sys: 10.3 ms, total: 125 ms
Wall time: 296 ms
}}}
vs before:
{{{
sage: P = groups.permutation.Symmetric(7)
sage: %time S = P.conjugacy_classes_subgroups()
CPU times: user 368 ms, sys: 40.4 ms, total: 408 ms
Wall time: 436 ms
sage: P = groups.matrix.GL(3, 3)
sage: %timeit P.conjugacy_classes_representatives()
1000 loops, best of 3: 1.02 ms per loop
sage: P = groups.permutation.Suzuki(8)
sage: %time S = P.conjugacy_classes_subgroups()
CPU times: user 139 ms, sys: 121 µs, total: 139 ms
Wall time: 264 ms
}}}
(For these timings, I ran it 10 times and took the best.)
Perhaps this change is asymptotically better. Could you post the group(s)
you are using to test this?
--
Ticket URL: <http://trac.sagemath.org/ticket/19585#comment:3>
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