comp.lang.idl-pvwave archive: archive » IDL program runs faster on slower CPU

Home » Public Forums » archive » IDL program runs faster on slower CPU

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: IDL program runs faster on slower CPU [message #88096 is a reply to message #88093]

Wed, 19 March 2014 16:06

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

On Wednesday, March 19, 2014 3:47:25 PM UTC-4, Arthur Vigan wrote:
> % Program caused arithmetic error: Floating underflow
>
> It is generated by a call to la_eigenql() that performs some singular value decomposition to perform principal component analysis. I had already tried with the eigenql() function but that did not influence the performance.
>
> I had come to believe that such underflow errors don't really matter, but maybe I am wrong?

Underflows are usually not a problem. But you can test whether EIGENQL is the bottleneck or not.

Report message to a moderator

[Message index]

		IDL program runs faster on slower CPU By: Deckard++; on Sun, 16 March 2014 15:15
		Re: IDL program runs faster on slower CPU By: Craig Markwardt on Mon, 17 March 2014 10:33
		Re: IDL program runs faster on slower CPU By: Deckard++; on Tue, 18 March 2014 05:22
		Re: IDL program runs faster on slower CPU By: Jim Pendleton on Tue, 18 March 2014 14:40
		Re: IDL program runs faster on slower CPU By: Craig Markwardt on Tue, 18 March 2014 18:47
		Re: IDL program runs faster on slower CPU By: Deckard++; on Wed, 19 March 2014 01:45
		Re: IDL program runs faster on slower CPU By: Craig Markwardt on Wed, 19 March 2014 10:45
		Re: IDL program runs faster on slower CPU By: Deckard++; on Wed, 19 March 2014 12:47
		Re: IDL program runs faster on slower CPU By: Craig Markwardt on Wed, 19 March 2014 16:06

Previous Topic:	IDL's function SFIT coefficients
Next Topic:	HOW TO COMPUTE BOUNDARY VALUES WHEN YOU HAVE TWO SPIKES IN YOUR DATA

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 17:54:45 PDT 2025

Total time taken to generate the page: 0.00457 seconds