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Re: large matrix operations [message #62872]

Tue, 14 October 2008 06:10

Vince Hradil
Messages: 574
Registered: December 1999

Senior Member

On Oct 13, 5:14 pm, "mgal...@gmail.com" <mgal...@gmail.com> wrote:
> On Oct 13, 3:17 pm, Vince Hradil <vincehra...@gmail.com> wrote:
>
>> Thanks for cleaning that up. I think the conclusions are the same -
>> matrix_multiply does not speed things up. I wonder what happens if we
>> really push the envelope wrt RAM and matrix size. Unfortunately, I
>> don't have a lot of time to play with this.
>
> MATRIX_MULTIPLY is about 15% faster in my tests, but I guess you were
> wanting a *very* significant speedup i.e. like the speedup you get
> when vectorizing code?
>
> Mike
> --www.michaelgalloy.com
> Tech-X Corporation
> Software Developer II

Yeah- I guess if you're doing a lot of these and each one can be 15%
faster then you might gain something. I was really expecting
(hoping?) MATRIX_MULTIPLY to be 50% or better faster. Besides, if my
programs run too fast how can I justify my salary? 8^)

I'm reminded of this: http://xkcd.com/303/

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[Message index]

		Re: large matrix operations By: Vince Hradil on Tue, 14 October 2008 06:10
		Re: large matrix operations By: Michael Galloy on Mon, 13 October 2008 15:14
		Re: large matrix operations By: Vince Hradil on Mon, 13 October 2008 14:17
		Re: large matrix operations By: Michael Galloy on Mon, 13 October 2008 13:51
		Re: large matrix operations By: David Fanning on Mon, 13 October 2008 10:39
		Re: large matrix operations By: Vince Hradil on Mon, 13 October 2008 10:07
		Re: large matrix operations By: Vince Hradil on Mon, 13 October 2008 09:00
		Re: large matrix operations By: Vince Hradil on Mon, 13 October 2008 08:08
		Re: large matrix operations By: David Fanning on Mon, 13 October 2008 08:04

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