From: Brian Gough <bjg@network-theory.co.uk>
To: ronis@onsager.chem.mcgill.ca
Cc: gsl-discuss@sources.redhat.com
Subject: Re: Speed Issues
Date: Tue, 11 Dec 2001 07:39:00 -0000 [thread overview]
Message-ID: <15391.46932.57669.695419@debian> (raw)
Message-ID: <20011211073900.VbuQefuhzYvohGyzD30fwadJwOcjt4UKn3I3NTcduUA@z> (raw)
In-Reply-To: <15391.34013.675987.972662@ronispc.chem.mcgill.ca>
David Ronis writes:
> I've also tried the IMSL routine ZSPOW (written in fortran from an
> early version of the IMSL library). As I mentioned at the outset, the
> gsl version is about 30% slower, although the two give identical
> roots.
Hi,
Before I look into this you're refering to the the speed per function
evaluation (or iteration) being 30% slower, not total runtime, and
ZSPOW is the same Powell scaled-hybrid algorithm?
regards
--
Brian Gough
> P.S., it doesn't seem to be in the documentation, but is there any
> convention as to what the initial stride of a gsl_vector is? When can
> I assume that it's 1 and will remain so?
Yes, it's assumed to be 1 if you use gsl_vector_alloc.
next prev parent reply other threads:[~2001-12-18 21:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-19 13:20 David Ronis
2001-12-10 13:34 ` David Ronis
2001-12-18 10:03 ` David Ronis
2001-12-19 13:20 ` Brian Gough [this message]
2001-12-11 7:39 ` Brian Gough
2001-12-18 13:41 ` Brian Gough
2001-12-19 13:20 ` Brian Gough
2001-12-11 12:22 ` Brian Gough
2001-12-18 13:42 ` Brian Gough
2001-12-19 13:20 ` David Ronis
2001-12-12 7:13 ` David Ronis
2001-12-18 13:59 ` David Ronis
2001-12-19 13:20 ` Brian Gough
2001-12-13 15:08 ` Brian Gough
2001-12-19 13:20 ` David Ronis
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