This latest release includes a lot of optimization. However, some of these require action on your part in order to take advantage of them. If you do not take action, no harm will come to your site, but it will not be benefited by a couple seconds of time knocked off of your page-load time.
- Formidable Pro CSS. Go to your Formidable -> Settings page and click update. On update, if your "uploads" folder is writable, and the auto-created "formidable" folder inside of it is writable, your current styling settings will be written into a straight css file. Every time you update your styling settings, this file will be updated as well. In past versions Formidable Pro has relied on a dynamic CSS file that was actually a PHP file with the styling inside of it. If your server is unable to create this file, your site will continue to use the PHP version.
- jQuery UI CSS. In addition to only loading the calendar styling only when one has been loaded on the page (unless you check the box in the settings to load it on all pages), you can also get rid of the external call to load this styling (https://ajax.googleapis.com). This change may or may not save you load-time, but some users have had trouble with this external call on a secure site. In my personal use, I have noticed seeing the message "Waiting for https://ajax.googleapis.com". Anyway, if you would like to host this styling on your own site, you can do so. Please see the instructions in the docs.