The server at http://any2djvu.djvuzone.org receives same files from local computers much slower than from links on other websites (with the same files have been uploaded to the other websites, such as dropbox.com).

The speed of uploading a file from local computers to other websites such as dropbox is also much faster than to any2djvu website.

For example, a pdf file of 17MB needs more than 1 min to be uploaded to any2djvu server from a local computer with normal ISP such as Comcast High-speed internet, but takes less than 3 seconds from a dropbox link to any2djvu server, and takes around 10 seconds from the same local computer to dropbox.

I wonder why there is such big differences for the speeds of different uploading ways to a web server?

Thanks!