Re: Algorithm Optimization

From	gah4 <gah4@u.washington.edu>
Newsgroups	comp.compilers
Subject	Re: Algorithm Optimization
Date	2020-09-16 13:59 -0700
Organization	Compilers Central
Message-ID	<20-09-040@comp.compilers> (permalink)
References	<20-09-032@comp.compilers> <20-09-037@comp.compilers>

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On Wednesday, September 16, 2020 at 8:14:44 AM UTC-7, mwmar...@gmail.com wrote:

(snip)

> This approaches the issue more from a "I want to replace serial
> algorithms with parallel algorithms." if I recall correctly so it may
> not be exactly what you are looking for.

That might make more sense.  So, an algorithm that it mathematically
equivalent, but not necessarily numerically equivalent.

One of the more obvious is matrix multiplication, which seems
so simple, but the traditional ones aren't so good.  For one, they
have poor cache performance on many machines.

It takes just a little more than parallelizing the usual algorithm
to get it right.

Replace matrix inversion with LU decomposition?

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Algorithm Optimization "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2020-09-13 13:00 -0400
  Re: Algorithm Optimization Elijah Stone <elronnd@elronnd.net> - 2020-09-14 20:47 -0700
    Re: Algorithm Optimization "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2020-09-15 00:42 -0400
  Re: Algorithm Optimization "Derek M. Jones" <derek@_NOSPAM_knosof.co.uk> - 2020-09-15 14:29 +0100
    Re: Algorithm Optimization gah4 <gah4@u.washington.edu> - 2020-09-15 22:25 -0700
      Re: Algorithm Optimization "Derek M. Jones" <derek@_NOSPAM_knosof.co.uk> - 2020-09-16 20:11 +0100
      Re: Algorithm Optimization Richard Harnden <richard.nospam@gmail.com> - 2020-09-16 22:45 +0100
      Re: Algorithm Optimization Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2020-09-17 06:35 +0200
        Re: Algorithm Optimization "A. K." <minforth@arcor.de> - 2020-09-21 02:12 -0700
      Re: Algorithm Optimization "Johann 'Myrkraverk' Oskarsson" <johann@myrkraverk.com> - 2021-04-21 16:29 +0000
  Re: Algorithm Optimization "mwmarkland@gmail.com" <mwmarkland@gmail.com> - 2020-09-16 07:57 -0700
    Re: Algorithm Optimization "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2020-09-16 11:44 -0400
    Re: Algorithm Optimization gah4 <gah4@u.washington.edu> - 2020-09-16 13:59 -0700
      Re: Algorithm Optimization Thomas Koenig <tkoenig@netcologne.de> - 2020-09-17 06:39 +0000
  Re: Algorithm Optimization Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2020-12-13 23:13 +0100
    Re: Algorithm Optimization gah4 <gah4@u.washington.edu> - 2020-12-20 22:45 -0800

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