Re: bug???
- To: mathgroup at smc.vnet.net
- Subject: [mg45281] Re: bug???
- From: "Matthew Senn" <msenn77 at yahoo.com>
- Date: Sat, 27 Dec 2003 05:00:19 -0500 (EST)
- References: <bs3nhd$io4$1@smc.vnet.net> <bs957v$c6m$1@smc.vnet.net>
- Reply-to: "Matthew Senn" <msenn77 at yahoo.com>
- Sender: owner-wri-mathgroup at wolfram.com
i got even faster times in mathematica 4.2 on my Celeron 1.8GHz with 512mb ram: 1st polynomial: 0.05 sec 2nd polynomial: 0.36 sec 3rd polynomial: 0.02 sec "George" <gtsavdar at auth.gr> wrote in message news:bs957v$c6m$1 at smc.vnet.net... > "ANDY" <wangzhengyao at hotmail.com> wrote in message news:<bs3nhd$io4$1 at smc.vnet.net>... > > hello, > > > > please running the next Expression: > > > > Timing[NSolve[x^802 + 4x^403 + 2x^2 - 3 == 0, x, 4]] > > > > in Mathematica4.1 and Mathematica 5. > > > > Why??? > > I've tried to run : > Timing[NSolve[x^802 + 4x^403 + 2x^2 - 3 == 0, x, 4]] > but after 5 minutes no result found so i stopped it. > What are your times on Mathematica 5.0 and 4.1? > > Then i run these: > ------------------------------------------------------ > Mathematica 5.0 > Timing[NSolve[x^80 + 4x^40 + 2x^2 - 3 == 0, x, 4]] > Time= 0.83 s > > Timing[NSolve[x^180 + 4x^40 + 2x^2 - 3 == 0, x, 4]] > Time= 13.67 s > > Timing[NSolve[x^50 + 4x^50 + 2x^2 - 3 == 0, x, 4]] > Time= 0.22 s > ------------------------------------------------------ > Mathematica 4.2 > Timing[NSolve[x^80 + 4x^40 + 2x^2 - 3 == 0, x, 4]] > Time= 0.11 s > > Timing[NSolve[x^180 + 4x^40 + 2x^2 - 3 == 0, x, 4]] > Time= 0.49 s > > Timing[NSolve[x^50 + 4x^50 + 2x^2 - 3 == 0, x, 4]] > Time= 0.05 s > ------------------------------------------------------ > > First case : Mathematica 5.0 is 7.5 times slower than Mathematica 4.2. > Second case: Mathematica 5.0 is 27.9 times slower than Mathematica 4.2. > Third case : Mathematica 5.0 is 4.4 times slower than Mathematica 4.2. > > So Mathematica 5.0 seems to be slower from Mathematica 4.2 in this > kind of operations. > All these from a PIV-1800 MHz of my university computers. >