1、http://blog.csdn.net/weiyastory/article/details/51513602 Java
GC 垃圾回收机制：http://blog.csdn.net/jiafu1115/article/details/7024323
http://www.cnblogs.com/jeffwongishandsome/p/talk-about-GC-and-how-to-use-GC-better.html
Java内存结构：http://www.cnblogs.com/ityouknow/p/5610232.html
2、OC http://www.cnblogs.com/jialiangliang/p/6184997.html
http://www.jianshu.com/p/f3c1b920e8eb
