#8158: efficiency problem with polynomials (SymbolicRing vs PolynomialRing)
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Reporter: zimmerma | Owner: malb
Type: defect | Status: new
Priority: major | Milestone: sage-5.12
Component: commutative algebra | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by zimmerma):
PolynomialRing is still slower with Sage 5.11, even with integer
coefficients:
{{{
+--------------------------------------------------------------------+
| Sage Version 5.11, Release Date: 2013-08-13 |
| Type "notebook()" for the browser-based notebook interface. |
| Type "help()" for help. |
+--------------------------------------------------------------------+
sage: var('a,b,c')
(a, b, c)
sage: %time d=expand((a+b+c+1)^100)
CPU times: user 16.35 s, sys: 0.26 s, total: 16.61 s
Wall time: 18.59 s
sage: P.<a,b,c> = PolynomialRing(QQ)
sage: %time d=(a+b+c+1)^100
CPU times: user 34.35 s, sys: 0.08 s, total: 34.42 s
Wall time: 35.80 s
sage: P.<a,b,c> = PolynomialRing(ZZ)
sage: %time d=(a+b+c+1)^100
CPU times: user 32.29 s, sys: 0.07 s, total: 32.36 s
Wall time: 34.89 s
}}}
Paul
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Ticket URL: <http://trac.sagemath.org/ticket/8158#comment:2>
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