On Wed, Feb 12, 2014 at 12:12 PM, Jori Mantysalo <jori.mantys...@uta.fi> wrote: > On Wed, 12 Feb 2014, William Stein wrote: > >> 1. It is *NOT* true. Sage just directly calls the PARI C library, >> which is always loaded on startup of Sage. > > > OK, good (or bad, which way one wants it to be...). > > >> It's pretty likely that when the line of code in question was written >> (prob in 2005 or 2006) this speed difference wasn't the case. > > > Maybe somebody has just tested this once for given precision? This used > about 1,5 seconds CPU time every time: > > gamma(RealField(prec=10000)(3.14159)) > > And this one only about 0,1 seconds, except that for first time it took 10,7 > seconds: > > gamma(ComplexField(prec=10000)(3.14159)) > > And reason is of course clear, as Fredrik Johansson wrote "If you cache > Bernoulli numbers, - -".
You have just made a very, very good point. -- William > > > -- > Jori Mäntysalo > > -- > 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 http://groups.google.com/group/sage-devel. > For more options, visit https://groups.google.com/groups/opt_out. -- William Stein Professor of Mathematics University of Washington http://wstein.org -- 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 http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/groups/opt_out.
