Slow display of thumbnails in Preview Area

One of the features of version 2 says:

"Thumbnails in the preview area are loaded asynchronous. It dramatically increases speed of folder reading;"


This may be true to some extent but it appears to me that 2.0 a lot is slower than 1.8 as far as displaying the thumbnails.

When selecting a folder with 40 files using 2.0, placeholders show up immediately but it takes about 4 secounds to display each thumbnail. During this time the system is so bogged down you can't do anything but wait.

With version 1.8 it takes about 1 second per image to display the thumbnails.

Are there any settings which affect this? The code I'm using for 2.0 is the sample code.

I'm referring to the initial display of images in the preview area, not resizing for upload.

We have fixed the problem. The update will be available within this week.

The update will be available in 2-3 days. I am sorry for delay.

We hope to release tomorrow version 2.1.

Here is list of changes:

# Added a drop-down list control which allows quick navigating through the folders in Windows Explorer style. You can put it on the same page with Image Uploader control and bind it to Image Uploader using AdditionalFolderNavigator property.
# Added CheckFilesBySelectAllButton property which changes the behaviour of the Select All button. If you set it to True, files will be checked (or put to upload list) unlike default behaviour when they are just selected . However SelectAll method still just selects files regardless to the value of this property (due security reason).
# Added methods which allow navigating special folders like "My Computer", "My Documents", "My Pictures", "My Video", "My Music" , etc. This way you can add buttons to the page for easier navigation. This functionality is available via GoToFolder and CanGoToFolder methods.
# Added GoToParentFolder and GoToPreviousFolder methods. You can add buttons to HTML which will call them providing user faster navigation.
# New licensing option is available. Now you can purchase a single IP address license (analogue of the single server license), which allows you using Image Uploader with unlimited number of domains mapped to the single IP address.
# Added Version property which allows verifying Image Uploader version in run-time (so that you can check if user has outdated version installed from JavaScript).
# Added ShowSubfolders property which allows folders to be displayed in the folder pane along with files.
# Added possibility to hide the folder tree (set TreePaneWidth property to -1 ).
# Folder "My Pictures" is placed in folder tree on the same level with "My Documents" (for faster navigation).
# Fixed the problem with Image Uploader installation on Windows 98.
# Fixed the problem with slow thumbnails creating.
# Fixed the memory leak.
# Fixed the problem with incorrect behaviour when selecting files with CTRL and SHIFT buttons.
# Fixed the problem with displaying thumbnails for JPEG files (sometimes Image Uploader did not display them).
# Fixed the problem with upload failure when submitting files to the page through HTTPS protocol.

I have downloaded the latest version of the Java version (1.1). It still seems pretty slow at showing thumbnails for large image files (2-3MB). On my Apple Powerbook running OSX Tiger, 1GB memory 1.25 GHz it takes about 4-5 seconds per thumbnail. Doesn't seem to matter how many files are in the directory.

Is there anyway to speed it up? Is it creating thumbnails on the fly or reading the stored thumbnail data? When I look at the directory in Finder it shows the thumbs instantly.

Is there anyway to speed it up? Is it creating thumbnails on the fly or reading the stored thumbnail data? When I look at the directory in Finder it shows the thumbs instantly.

Image Uploader Java version creates thumbnails on fly, at that time as ActiveX one reads embedded EXIF thumbnails (I think Finder works the same).

We plan to add reading embedded thumbnails in next Java version update.