#15792: A previously fixed regression has reappeared
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Reporter: SimonKing | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.2
Component: performance | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Description changed by SimonKing:
Old description:
> In #11900, some regressions were fixed that have been introduced in
> #9138. It seems that one of the examples from #11900 shows a regression
> again:
> {{{
> sage: %time D = J0(46).endomorphism_ring().discriminant()
> CPU times: user 10.07 s, sys: 0.20 s, total: 10.27 s
> }}}
> with the current master. That's almost twice as much as it used to be
> pre-#9138 and post-#11900. Alright, it's a different computer. But still,
> there seems to be an issue.
New description:
In #11900, some regressions were fixed that have been introduced in #9138.
It seems that one of the examples from #11900 shows a regression again:
{{{
sage: E = J0(46).endomorphism_ring()
sage: %time g = E.gens()
CPU times: user 10.27 s, sys: 0.22 s, total: 10.49 s
Wall time: 10.63 s
}}}
with the current master. That's almost twice as much as it used to be
pre-#9138 and post-#11900. Alright, it's a different computer. But still,
there seems to be an issue.
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Ticket URL: <http://trac.sagemath.org/ticket/15792#comment:1>
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