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MathGroup Archive 2007

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Re: Eigenvalues in Mathematica 6.0.0 are SLOW

  • To: mathgroup at smc.vnet.net
  • Subject: [mg75755] Re: Eigenvalues in Mathematica 6.0.0 are SLOW
  • From: Antti Penttilä <Antti.I.Penttila at invalid.helsinki.fi>
  • Date: Thu, 10 May 2007 05:05:31 -0400 (EDT)
  • Organization: University of Helsinki
  • References: <200705080941.FAA18244@smc.vnet.net> <f1s0rr$do3$1@smc.vnet.net>

Murray Eisenberg wrote:
> That dramatic difference is not invariant across platforms.

Eigenvalues are computed using a third-party (Intel) linear algebra
library. Different versions of this library are optimized better or
worse for different processors and/or operating systems. For instance,
the libraries were optimized for the original AMD Athlon (WinXP) in
Math5.0, but not anymore in Math5.2. Thus, linear algebra with Athlon
machine became slower.

=> When talking about performance, please include information about you=
r
processor also.

Regards,
Antti Penttil=E4


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