WebUtil_File.File_Open_Dialog VERY SLOW with large amounts of files

Dear Friend,
We are using WebUtil_File.File_Open_Dialog on the client to allow for the selection of an image from a folder on the server, which contains around 2-3000 files.
It takes around 10-15 minutes to display the files within the folder. This is obviously unacceptable and I was wondering if anyone had come up with a viable solution to this problem, as i noticed similar issues had been posted in the past and no solution was suggested.
The function call for the above operation is: :control.fichier := WebUtil_File.File_Open_Dialog(:global.path||'images\bdsurvey\', '', '*.jpg |*.jpg| (All files)*.* |*.*|', 'Nom du fichier photo');
Many thanks,
John

This can be done by the following:
Tuning the file system - reducing/filtering unwanted files, defragmentation, FAT (NTFS might consume more time)
I am not sure whether you can do anything for this in AS.
Alternatively there are some java classes which may be used instead of web util.

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