Yes but if Pynac had such a type, and fast, the operations with any roots (as parts of expressions) would be much simplified. Relying on Python/Cython code from the C++ end is always tedious and slow.
On Mon, May 29, 2017, 10:12 John Cremona <john.crem...@gmail.com> wrote: > > > On 29 May 2017 07:59, "Ralf Stephan" <gtrw...@gmail.com> wrote: > > The case that started me was > > sage: a=SR(1/2) > sage: b=SR(3) > sage: %timeit _=a^b > The slowest run took 9.38 times longer than the fastest. This could mean that > an intermediate result is being cached. > 100000 loops, best of 3: 2.14 µs per loop > sage: %timeit _=b^a > 10000 loops, best of 3: 62.1 µs per loop > > but I think I can shortcut > > > Your example does not use QQbar at all! It uses SR (Symbolic Ring) which > is quite different. > > > > Python/Cython usage here. > I also wanted to scout the software landscape before any other decisions. > > > On Monday, May 29, 2017 at 8:39:59 AM UTC+2, Dima Pasechnik wrote: >> >> >> >> On Monday, May 29, 2017 at 6:09:33 AM UTC+1, Ralf Stephan wrote: >>> >>> On Sunday, May 28, 2017 at 11:40:08 PM UTC+2, Jeroen Demeyer wrote: >>>> >>>> On 2017-05-26 15:19, Ralf Stephan wrote: >>>> > The qqbar source does not use a lower-level library. >>>> >>>> What do you mean with this? It actually uses quite a large fraction of >>>> Sage (number fields, polynomials, interval arithmetic, ...) >>>> >>> >>> Make that "lower-language-level" i.e. C/C++. There was also >>> the words "one" and "fast" in my original post. >>> >> >> Is qqbar really so slow? Perhaps you could point out particularly slow >> for your purposes parts ? >> >> > -- > You received this message because you are subscribed to the Google Groups > "sage-devel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-devel+unsubscr...@googlegroups.com. > > > To post to this group, send email to sage-devel@googlegroups.com. > Visit this group at https://groups.google.com/group/sage-devel. > For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to a topic in the > Google Groups "sage-devel" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/sage-devel/3cSPt18Fv7Y/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > sage-devel+unsubscr...@googlegroups.com. > To post to this group, send email to sage-devel@googlegroups.com. > Visit this group at https://groups.google.com/group/sage-devel. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
