johnieB on "[Plugin: W3 Total Cache] Looking ahead to PHP 5.5... Zend Optimizer & the end of APC"

There is a heated debate here about Zend and APC. Everyone seams to understand it in their own way but perhaps this article will clear things up for all members http://www.ricardclau.com/2013/03/apc-vs-zend-optimizer-benchmarks-with-symfony2/.
Things that you will find here also include a graphic representation of features. Also take a look at this post about Zend http://www.techyv.com/questions/zend-frame-work-last-version-auto-update.