Cakephp cache used to store cache of entire layout and views. It store cache in tmp/cache/views/ folder. for use cache helper we need to use the below code in our controller

var $helpers = array('cache');

and we can also give cache time for example

$this->cacheAction=array('duration'=>60);

in this code caches the action for 60 second

and for a partcular action we can use action name

public $cacheAction = array(
    'view' => 36000,
    'index'  => 48000
);

Some time we don't want cache some part of a view we want a div or a form cache free for doing this we can use 'nocache'

<!--nocache-->
<?php if ($this->Session->check('User.id')): ?>
    Welcome, <?php echo h($this->Session->read('User.username')); ?>.
<?php else: ?>
    <?php echo $this->Html->link('Signin', 'users/login'); ?>
<?php endif; ?>
<!--/nocache-->