Opened 14 years ago
Last modified 13 years ago
#301 new bug
char set slower in 3.1.0 compared to 3.0.4??
Reported by: | seelisch | Owned by: | levandov |
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Priority: | minor | Milestone: | 3-1-3 and higher |
Component: | dontKnow | Version: | 3-1-0 |
Keywords: | char sets, minimal primes | Cc: |
Description
Example from Viktor, investigate (Hans, Gerhard)
Change History (3)
comment:1 Changed 14 years ago by
comment:2 Changed 13 years ago by
Excerpts from email correspondence of Valery Romanovski and Japanese guys from RISA/Asir team, 2009 are to be found below. As examples of computation nearly any example coming form Romanovski can be taken: there are complicated minimal primes. The most challenging examples can be found in my directory http://www.math.rwth-aachen.de/~Viktor.Levandovskyy/filez/chals/ (mckay.tst is the only examples not of this type). A typical one is http://www.math.rwth-aachen.de/~Viktor.Levandovskyy/filez/chals/vr_five11.tst .
I remember this change of performance on Romanovski's problems very distinctly, since minAssChar was our default instrument.
Regards, Viktor
Romanovski: ...with the recent version of Singular minAssGTZ found the decomposition in about 2 min, but minAssChar is still running (more than one hour).
Japanese:
- Unfortunately, your problem was too difficult to solve by our technique. This problem brought about huge coefficients over Q.
- We have recently found that in our problem, minAssChar in Singular 3-1-0 is about three times slower than that in Singular 3-0-4. We guess that this unfortunate phenomenon arises from a change of `factorization' of Singular 3-1-0.
comment:3 Changed 13 years ago by
Keywords: | char sets minimal primes added |
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Version: | 3-1-2 → 3-1-0 |
If this is true, then why did we not notice (by means of general test set when releasing a new version)?