O Guia Definitivo do Yii 1.1

etrieve the cookie with the specified name
$cookie=Yii::app()->request->cookies[$name];
$value=$cookie->value;
......
// send a cookie
$cookie=new CHttpCookie($name,$value);
Yii::app()->request->cookies[$name]=$cookie;
Ajustes no Desempenho
Performance of Web applications is affected by many factors. Database access, file
system operations, network bandwidth are all potential affecting factors. Yii has tried in
every aspect to reduce the performance impact caused by the framework. But still, there
are many places in the user application that can be improved to boost performance.
Enabling APC Extension
Enabling the PHP APC extension is perhaps the easiest way to improve the overall
performance of an application. The extension caches and optimizes PHP intermediate
code and avoids the time spent in parsing PHP scripts for every incoming request.
Disabling Debug Mode
Disabling debug mode is another easy way to improve performance. A Yii application runs
in debug mode if the constant YII_DEBUG is defined as true. Debug mode is useful during
development stage, but it would impact performance because some components cause
extra burden in debug mode. For example, the message logger may record additional
debug information for every message being logged.
Using yiilite.php
When the PHP APC extension is enabled, we can replace yii.php with a different Yii
bootstrap file named yiilite.php to further boost the performance of a Yii-powered
application.
The file yiilite.php comes with every Yii release. It is the result of merging some commonly
used Yii class files. Both comments and trace statements are stripped from the merged
file. Therefore, using yiilite.php would reduce the number of files being included and avoid
execution of trace statements.
Note, using yiilite.php without APC may actually reduce performance, because yiilite.php
contains some classes that are not necessarily used in every request and would take extra
parsing time. It is also observed that using yiilite.php is slower with some server
configurations, even when APC is turned on. The best way to judge whether to use
yiilite.php or not is to run a benchmark using the included hello world demo.
Using Caching Techniques