Can Joomla compression be enabled at any time?
Yes, you can enable/disable gzip compression at any time. When you add new resources to your site they will be automatically compressed if gzip is enabled.
Does the Joomla system cache plugin affect the feeds?
Usually the system cache plugin affects the feeds when it is loaded before the feed plugin. Try repositioning the system cache plugin and make sure that it is after the feeds extension.
Are Joomla gzip, and .htaccess DEFALTE different types of compressions?
The Joomla! CMS uses special algorithms to compress the data and it needs mod_gzip or mod_deflate to be enabled on the server. The two modules (gzip and deflate) are developed for different versions of the Apache web server. They also use different compression algorithms. Basically, gzip and deflate are different but the final result is one and the same – output is compressed. The .htaccess DEFLATE rules that are mentioned in the presentation optimize your site even more. Thus, you can use both Joomla! compression and also add the .htaccess rules.
Is it recommended to use multiple compression extensions? (ex: RokBooster with JCH Optimize)
It depends on the extensions. Some of the data should not be compressed more than once because at a later stage browsers may not be able to decompress the information. Always test and if you notice problems with JCH Optimize and RokBooster then disable JCH Optimize compression and configure the plugin to only combine your JS and CSS files. This way you will avoid double compression problems.
Is the proposed .htaccess code applicable for Joomla 1.5?
Yes, you can use the code if you run a Joomla 1.5 website. The only requirement is to have mod_deflate and mod_expires added to the Apache global configuration.
How does SiteGround do the “htaccess” magic – through the .htaccess file, or another way?
We have a global configuration file which uses similar .htaccess rules and these rules are valid for all sites on our servers. This configuration file is something like a global .htaccess file which is loaded before your website is displayed.
With JCH optimize extension, do you have to clear any cache to see your page edits right after you make them?
The JCH optimize plugin is not supposed to cache your Joomla! articles and other data provided by additionally installed components. Thus, there is no need to clear the cache in order to see your changes.
Should we disable any default plugins to increase the speed and if yes, which ones?
If you have a default Joomla! CMS then you don’t need to disable any extensions. However if you have a customized site with various plugins and extensions installed, always make sure to disabled the ones you do not need or use. The page loading speed will not be drastically improved but the page size itself will be decreased which helps for faster loading speed.
If I have JHC Optimized well, is it still good to use SuperCacher?
Yes, you can and you should use the SuperCacher. It allows you to configure your Joomla! to use Memcached and it also allows you to use our Joomla! friendly reverse proxy setup. You can also enable Google mod_pagespeed from the SuperCacher. The JCH plugin does not provide these functionalities.
One of the options in JCH Optimize requires zlib to be installed. How do I check for that, and where do I get it?
Your PHP must be compiled with zlib support. To check if zlib is supported you can create a PHP info file on your end. For more details check the following link: