What is easy to do to improve speed from test result?

[pmeenan]

Stay away from XML and JSON. Some versions of IE don't react well to gzipped responses to AJAX calls. HTML, text, css and javascript are safe across-the-board.

Here is the .htaccess I have in place on WebPagetest:

Code:

<IfModule mod_deflate.c>
    AddOutputFilterByType DEFLATE text/plain    
    AddOutputFilterByType DEFLATE text/html
    AddOutputFilterByType DEFLATE text/css
    AddOutputFilterByType DEFLATE text/javascript
    AddOutputFilterByType DEFLATE application/javascript
    AddOutputFilterByType DEFLATE application/x-javascript
</IfModule>

The site will look exactly the same to the users (just faster) and as a bonus you'll use less bandwidth which can save you money if you get charged for it.