PHP Advanced and Object-Oriented Programming 3rd Edition
As for the technical negatives of OOP, use of objects can be less efficient than a procedural approach.The performance difference between using an object or not may be imperceptible in some cases, but you should be aware of this potential side effect.
发问：
0-猜想，对于其他语言同样，函数式代码的执行效率要高，为什么？
use of objects can be less efficient than a procedural approach
原文：http://www.cnblogs.com/yuanjiangw/p/5769295.html
