> I suspect that Rob doesn't know... No, I hadn't realized that, but now I know. Thanks to both for the info on doctests.
On Feb 8, 4:08 am, William Stein <wst...@gmail.com> wrote: > On Sun, Feb 8, 2009 at 1:27 AM, mabshoff <mabsh...@googlemail.com> wrote: > > > On Feb 8, 1:18 am, Rob Beezer <goo...@beezer.cotse.net> wrote: > >> William, > > >> Thanks for all the helpful advice - that'll get me started. > > >> > So you're saying that when somebody changed from Sage just having > >> > "kernel" (the way I implemented it) to having left_kernel and > >> > right_kernel methods, they messed things up in such a way that > >> > left_kernel is 1000 times slower than right kernel for the above > >> > example? > > >> Well, I think maybe the actual mess-up-factor is O(n^2) or O(n^3) or > >> something like that. :-) > > >> I'll start at the top in matrix2.pyx and it should be straightforward > >> to get the left/right dichotomy straightened out. That should then > >> make my grander plans easier. > > >> Regarding a doctest. I know they can be tagged as "random" (can't > >> recall the details at the moment), > > > Why? No doctest should be tagger #random unless it can be absolutely > > avoided. Maybe you meant #long? But it is is quick there is no point > > to do so. > > I suspect that Rob doesn't know that if one writes a doctest like this: > > sage: a = random_matrix(ZZ,200) > sage: d = a.det() > > then it is 100% deterministic. In Sage, before every doctest block, > the random number generator is reset. > > >> so it would be appropriate to put > >> in a large random example that *should* finish quickly? Is there a > >> mechanism to determine if it runs too long? Or do we just assume > >> somebody notices the delay? > > If a doctest -- such as computing that kernel over QQ -- goes from 1 > seconds to suddenly taking 1000 seconds, it seems likely somebody > would notice the delay. > > There is no mechanism to specify that a doctest must take less than n seconds. > > William --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
