comp.lang.idl-pvwave archive: archive » Re: Findfile in large directories

Home » Public Forums » archive » Re: Findfile in large directories

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

Re: Findfile in large directories [message #50624 is a reply to message #50598]

Fri, 06 October 2006 11:26

George N. White III is currently offline

George N. White III
Messages: 56
Registered: September 2000

Member

On Fri, 6 Oct 2006, Wox wrote:

> Dear All,
>
> In a widget application I'm making, I have "next file", "previous
> file" buttons which do the following:
> ...
> path = findfile(list.path+'*'+list.Format)
> nfiles = n_elements(path)
> path = SortListFiles(path,list.sortmethod,list.sortseparator)
> ind = where(path eq list.path+list.file,count)
> ...
> <take next or previous file (if any) and read/display it>
> ...
>
> The current loaded file is "list.path+list.file". SortListFiles sorts
> the files (in general not just string sort).
>
> However, in directories with up to 1000 or more files (usually also on
> an SMB mounted drive), this is rather slow (findfile takes most time).
>
> Any ideas how to make this faster?

If the contents of the directories are not updated too often you can
generate a cached list of the files. This is essentially what is done by
most TeX (math typesetting) implementations, using the unix "ls -R"
command to cache the names for a directory tree.

--
George N. White III <aa056@chebucto.ns.ca>

Report message to a moderator

[Message index]

		Re: Findfile in large directories By: David Fanning on Mon, 09 October 2006 06:00
		Re: Findfile in large directories By: greg michael on Mon, 09 October 2006 03:35
		Re: Findfile in large directories By: Wox on Mon, 09 October 2006 00:14
		Re: Findfile in large directories By: George N. White III on Fri, 06 October 2006 11:26
		Re: Findfile in large directories By: David Fanning on Fri, 06 October 2006 07:22
		Re: Findfile in large directories By: Wox on Fri, 13 October 2006 01:03

Previous Topic:	Re: difference between icontour and contour?
Next Topic:	Findfile in large directories

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sun Oct 12 01:31:10 PDT 2025

Total time taken to generate the page: 0.08157 seconds