This trick will dramatically improve  your Joomla performance, if you running Joomla 1.0. It’s very easy to implement. As you now Joomla modules are one of most server CPU requiring applications.

First of all, enable global caching:

Site > Global configuration > Cache  and check Caching to yes.

Now it will cache only some of modules, which has caching enable. But best off all, you can enable caching to any module! To do that you will have:

• Open any module .xml file. If you open /modules folder, there you will see two module files in most cases: module_name.php and module_name.xml . Open both of them module_name.xml
• Add right after “<params>”:

<param name="cache" type="radio" default="0" label="Enable Cache" description="Select whether to cache the content of this module">
            <option value="0">No</option>
            <option value="1">Yes</option>
        </param>

Now go the this module preferences in Joomla Modules administration. Enable Caching to yes.