On Sat, Jul 19, 2008 at 1:53 PM, Shing <[EMAIL PROTECTED]> wrote:
>
> Hi,
> I have tried the standalone Python/Script at
> http://www.sagemath.org/doc/html/tut/node55.html
>
> to factorize a number.
>
> #!/usr/bin/env sage
>
> import sys
> from sage.all import *
>
> if len(sys.argv) != 2:
> print "Usage: %s <n>"%sys.argv[0]
> print "Outputs the prime factorization of n."
> sys.exit(1)
>
> print factor(sage_eval(sys.argv[1]))
>
>
> The script takes about 12s to factories 2006. But in the notebook,
> it takes less than 1 second.
> I would like to use a standalone script from command line to do some
> computation. Is there a way to speed it up ?
>
> I am using Sage 3.0.3 on a Athlon 3200 64bit PC, running OpenSuse 11.
>
> Thanks in advance for any assistance!
>
The Sage startup time in sage-3.0.5 is better than in 3.0.3, so you might
want to try upgrading. Are you *just* factoring integers are do you plan
to do much more? This is fast:
teragon-2:~ was$ time echo "factor(2006)" | sage -gp
GP/PARI CALCULATOR Version 2.3.3 (released)
i386 running darwin (ix86/GMP-4.2.1 kernel) 32-bit version
compiled: May 4 2008, gcc-4.0.1 (Apple Inc. build 5465)
(readline v5.2 enabled, extended help available)
Copyright (C) 2000-2006 The PARI Group
PARI/GP is free software, covered by the GNU General Public License, and
comes WITHOUT ANY WARRANTY WHATSOEVER.
Type ? for help, \q to quit.
Type ?12 for how to get moral (and possibly technical) support.
parisize = 4000000, primelimit = 500000
%1 =
[2 1]
[17 1]
[59 1]
Goodbye!
real 0m0.388s
user 0m0.033s
sys 0m0.051s
-- William
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