#10181: speed up AbelianGroup().subgroups()
----------------------------+-----------------------------------------------
Reporter: zimmerma | Owner: joyner
Type: enhancement | Status: new
Priority: major | Milestone: sage-4.6
Component: group theory | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
----------------------------+-----------------------------------------------
This was reported by Emmanuel Thome:
{{{
----------------------------------------------------------------------
| Sage Version 4.5.2, Release Date: 2010-08-05 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
sage: time len(AbelianGroup([2,4,8]).subgroups())
CPU times: user 2.35 s, sys: 0.14 s, total: 2.49 s
Wall time: 14.75 s
81
}}}
With Magma:
{{{
Magma V2.16-10 Thu Oct 28 2010 11:25:26 on andouille [Seed =
3141449269]
Type ? for help. Type <Ctrl>-D to quit.
Loading startup file "/users/caramel/zimmerma/.magmarc"
> time #Subgroups(AbelianGroup([2,4,8]));
81
Time: 0.020
}}}
Maybe #9773 helps, I did not try.
Paul Zimmermann
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10181>
Sage <http://www.sagemath.org>
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