Jacob Santos has started a series of posts to his blog that focuses on the use of the opcode cache and language features in your applications.

The posts will be researched and go through multiple drafts for professionalism before posting. In this hope, it will strive to enable discussion that isn’t flaming and collective of the topic at hand. For as much as I can achieve at my level of writing skill and researching the topic at hand.

He he goes through the purpose of the posts, the areas he's going to focus on, some about the theory that will be used, and the implementation and documentation he'll provide through the series.