O Guia Definitivo do Yii 1.1

Note: The scriptMap feature described in the following has been available since
version 1.0.3.
First, we declare the scripts to be minimized by configuring the scriptMap property of the
clientScript application component. This can be done either in the application configuration
or in code. For example,
$cs=Yii::app()->clientScript;
$cs->scriptMap=array(
'jquery.js'=>'/js/all.js',
'jquery.ajaxqueue.js'=>'/js/all.js',
'jquery.metadata.js'=>'/js/all.js',
......
);
What the above code does is that it maps those JavaScript files to the URL /js/all.js. If any
of these JavaScript files need to be included by some components, Yii will include the
URL (once) instead of the individual script files.
Second, we need to use some tools to merge (and perhaps compress) the JavaScript files
into a single one and save it as js/all.js.
The same trick also applies to CSS files.
We can also improve page loading speed with the help of Google AJAX Libraries API. For
example, we can include jquery.js from Google servers instead of our own server. To do
so, we first configure the scriptMap as follows,
$cs=Yii::app()->clientScript;
$cs->scriptMap=array(
'jquery.js'=>false,
'jquery.ajaxqueue.js'=>false,
'jquery.metadata.js'=>false,
......
);
By mapping these script files to false, we prevent Yii from generating the code to include
these files. Instead, we write the following code in our pages to explicitly include the script
files from Google,