Karim BELABAS on Wed, 19 Jun 2002 17:33:58 +0200 (MEST) |
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Re: nffactor() slowdown |
On Tue, 18 Jun 2002, Igor Schein wrote: > I compared nffactor's speed between 2.2.3 and 2.2.4, and latter > is on average 10-25% slower on the type of polynomials I tried - large > Galois polynomials over cyclotomic or quarternion fields. (hence totally split polynomials ?) Does nfroots suffer from the same problem ? Can you post a few representative examples ? Karim. P.S: it could be due to the change of bound for the coefficient size (from Beauzamy back to Mignotte). -- Karim Belabas Tel: (+33) (0)1 69 15 57 48 Dép. de Mathematiques, Bat. 425 Fax: (+33) (0)1 69 15 60 19 Université Paris-Sud Email: Karim.Belabas@math.u-psud.fr F-91405 Orsay (France) http://www.math.u-psud.fr/~belabas/ -- PARI/GP Home Page: http://www.parigp-home.de/