在对象访问速度，内存利用率和Java芯片系统复杂度之间合理折衷。
A perfect tradeoff will be gained among the object accessing performance, the memory utilization and the Java chip system simplicity.
增加自动对象实例变量打包(automatic object ivar packing)功能(提升内存利用率)。
延迟加载：它的目的是优化数据服务器的内存利用率，当程序启动后优先加载那些需要加入到内存的对象，不需要加载的推后加载。
Lazy loading: The purpose of lazy loading is to optimize memory utilization of database servers by prioritizing components that need to be loaded into memory when a program is started.
为了提高CPU的利用率，采用了多线程技术，并且设计了按同一顺序访问对象的方法以防止死锁发生。
In order to improve CPU utilization, use of multi-threading technology, and design a same sequential access method to prevent the deadlock.
为各类学习内容对象提供高效的存储管理，为各种使用者提供方便快捷的存取功能，从而提高教学资源对象的利用率已经尤为重要。
Efficient storage management of all types of learning object and convenient and efficient access function for all users so as to enhance the efficiency targets has become critical especially.
为各类学习内容对象提供高效的存储管理，为各种使用者提供方便快捷的存取功能，从而提高教学资源对象的利用率已经尤为重要。
Efficient storage management of all types of learning object and convenient and efficient access function for all users so as to enhance the efficiency targets has become critical especially.
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