#9944: categories for polynomial rings
--------------------------------------------+-------------------------------
Reporter: robertwb | Owner: nthiery
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.7.1
Component: categories | Resolution:
Keywords: | Work_issues:
Upstream: N/A | Reviewer: Nicolas M.
Thiéry, Mike Hansen, Martin Raum
Author: Robert Bradshaw, Simon King | Merged:
Dependencies: |
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Changes (by jdemeyer):
* status: needs_review => needs_work
Comment:
There is a huge performance regression in creating iterated polynomial
rings:
BEFORE:
{{{
sage: S = GF(9,'a')
sage: %time for n in range(11): S = PolynomialRing(S,'w')
CPU times: user 0.00 s, sys: 0.00 s, total: 0.00 s
Wall time: 0.00 s
}}}
AFTER:
{{{
sage: S = GF(9,'a')
sage: %time for n in range(11): S = PolynomialRing(S,'w')
CPU times: user 53.38 s, sys: 0.19 s, total: 53.57 s
Wall time: 53.58 s
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9944#comment:47>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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