Slow load times when viewing your PVE Web/Ajax PaperVision Login Page


Whenever a user accesses a website, the browser caches static files such as HTML, javascript, images, etc. If each file individually doesn't set an expiration, then the file is stored in the local browser cache with no expiration date. Note that there is no way (in the file itself) to set the expiration for image and javascript files.

Each subsequent time the user accesses the same website, the browser, before it requests a file, determines if it is already in the local browser cache. If the expiration date for the cached file has not expired, it just uses the file out of cache.

However, if the expiration has expired (or the expiration is not set), the browser will query the website to determine if the file has a newer date than what it has cached.  In the AJAX PVE/ImageSilo world, there are over 100 files that are cached to the local browser (when first hitting the Login page), all of which have no expiration date. Most of those files are images, CSS files, or javascript files.


To help speed up your load times you can set content expirations on the web server. Follow the steps below in IIS on your Web Server:

  1. For the PVE website (in IIS Services Manager), right click on the "Images" directory and select Properties
  2. In the HTTP Headers tab, turn on 'Enable content expiration' and select 'Expire after 14 days' (you may make this longer if you wish). Click OK.
  3. Repeat steps '1' and '2' for the "javascriptdojo" directory.

Filed under PaperVision® Enterprise, R65

Last modified June 21, 2017

Submitted Jan 09, 2009

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