> This works fine with few local files, but gets
> extremly slow when accessing folders with more than
> 500 files or folders on LAN-network drives.

> This is the code I use: (it's copied from msdn):

> function ShowFolderFileList(folderspec)
> {
>    var fso, f, f1, fc, s;
>    fso = new ActiveXObject("Scripting.FileSystemObject");
>    f = fso.GetFolder(folderspec);
>    fc = new Enumerator(f.files);
>    s = "";
>    for (; !fc.atEnd(); fc.moveNext())
>    {
>       s += fc.item();
>       s += "<br>";
>    }
>    return(s);
> }

> If I access fc.item() with let's say fSize=fc.item().Size
> performance gets even worth.
> Does anybody know a faster way to collect
> folder information like subfolders and files ?
> I do not need a handle to the files, I only want to
> retrieve names and sizes of subfolders and files.

> thanks in advance,
> Michael Wender

> PS: I know the script is JScript, but usually VBScript-groups are
> more into FileSystemObject - so please don't blame me for that..

> But your biggest hit is coming from string manipulation. Every time you
> append to a string, JScript has to make a completely new string and destroy
> the old one. Your loop appends to the string twice! Changing it to append
> only once speeds up the loop by a factor of two (surprise!).

>   for (; !fc.atEnd(); fc.moveNext())
>   {
>      s += fc.item()+"<br>";
>   }

> But for real time savings, don't manipulate strings inside a loop! Array
> manipulation is relatively cheap.

>   s = new Array();
>   for (; !fc.atEnd(); fc.moveNext())
>   {
>     s[s.length] = fc.item();
>   }
>   s = s.join("<br>");

> =-=-=
> Steve
> -=-=-

> > I'm using FileSystem.object to display all files and subfolders
> > of a certain folder on the client maschine.
> > Code is executed inside an .hta.

> > This works fine with few local files, but gets
> > extremly slow when accessing folders with more than
> > 500 files or folders on LAN-network drives.

> > This is the code I use: (it's copied from msdn):

> > function ShowFolderFileList(folderspec)
> > {
> >    var fso, f, f1, fc, s;
> >    fso = new ActiveXObject("Scripting.FileSystemObject");
> >    f = fso.GetFolder(folderspec);
> >    fc = new Enumerator(f.files);
> >    s = "";
> >    for (; !fc.atEnd(); fc.moveNext())
> >    {
> >       s += fc.item();
> >       s += "<br>";

> So if I change my code to:
> ###
>  for (; !fc.atEnd(); fc.moveNext())
>  s[s.length] = fc.item(); <--- just getting File-Object
>  }
> ###
> That's very fast.

> But:
> ###
>  for (; !fc.atEnd(); fc.moveNext())
>  s[s.length] = fc.item().Name; <--- accessing the File-Object
> }
> ###
> This results in poor perfomance.

> I guess JScript is really accessing each file
> in the second case.
> What I need is just names and sizes of files;
> I don't need any further information.

> Any idea how to do that - maybe without filesystemobject ?
> Maybe some ActiveX-Object that could do that ?

> best regards,
> Michael Wender