When using Zend Framework's MVC layer, chances are you will be using
Zend_View. Zend_View is performs well
compared to other view or templating engines; since view scripts
are written in PHP, you do not incur the overhead of compiling custom
markup to PHP, nor do you need to worry that the compiled
PHP is not optimized. However, Zend_View presents
its own issues: extension is done via overloading (view helpers), and a number of view
helpers, while carrying out key functionality do so with a performance
cost.




