comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » call external speed

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

Re: call external speed [message #12909 is a reply to message #12686]

Mon, 14 September 1998 00:00

Karl Krieger
Messages: 8
Registered: April 1995

Junior Member

On Tue, 8 Sep 1998, David Foster wrote:

> ... Just for kicks, I decided to compare the speed of my
> routine and IDL's INTERPOLATE() routine. The results were *very*
> similar. I would say that it is fairly safe to say that IDL's
> routines are well optimized.

It really depends on the application. I wrote a LINKIMAGE wrapper for the
FFTW package ( http://theory.lcs.mit.edu/~fftw ) and compared the speed to
IDL's native FFT routine. The speed gain for single precision
real->complex 2d transforms is about 2.5 on a SUN Ultra/170 and about 2.3
on a Pentium/133 under WinNT, so it's really worth the effort if you want
to do FFT of large data sets.

Karl
--
Max-Planck-Institute for Plasma Physics
Boltzmannstr.2, 85740 Garching, Germany Email: krieger@ipp.mpg.de

Report message to a moderator

[Message index]

		call external speed By: curtis volin on Wed, 02 September 1998 00:00
		Re: call external speed By: steinhh on Fri, 04 September 1998 00:00
		Re: call external speed By: rmlongfield on Fri, 04 September 1998 00:00
		Re: call external speed By: Karl Krieger on Thu, 03 September 1998 00:00
		Re: call external speed By: David Foster on Tue, 08 September 1998 00:00
		Re: call external speed By: Karl Krieger on Mon, 14 September 1998 00:00

Previous Topic:	Problems with IDLgrText.
Next Topic:	Annoyances...how about this one?

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sat Oct 11 07:07:48 PDT 2025

Total time taken to generate the page: 1.35848 seconds