#4593: do not uncinditionally use M2 for Gbasis computations over ZZ if it is
installed
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Reporter: mabshoff | Owner: malb
Type: defect | Status: new
Priority: blocker | Milestone: sage-3.4
Component: commutative algebra | Resolution:
Keywords: |
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Comment (by was):
For the record, thinking about this, it does seem stupid to not just use
M2 when it is available, just because we can't proper doctest this. A
natural way to fix this would be to make the output random, get rid of the
verbose warning altogether, and include an extra example that is marked
{{{
# optional -- macaulay2
}}}
I think *all* warnings about "using slow toy implementations" for any
algorithm in sage should use some sort of unified framework, which is
different (but related to) the verbose flag. E.g., each slow function
would at the start call a function defined in misc:
{{{
slow("Groebner over ZZ -- install M2 to speed this up")
}}}
This would print a warning iff a certain flag is set, which would be off
by default.
It would be good to add calls like that everywhere e.g., in the base
classes for matrices and other places where we have "slow generic code".
Then when people run code, they can set the flag and see a list of
messages indicating exactly what they need to do to eliminate generic code
from that a given code path, which would tip them off about how to speed
up their code.
Obviously, this has to be done carefully. E.g., it would be bad to put
slow(...) in the matrix __getitem__ method, since that would slow the
__getitem__ method itself down.
-- William
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4593#comment:3>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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